For coal mine clearance machines Guo Tuen mine

Release date：2012-11-6  information：The Xuzhou mine Tianke Mining Technology Co., Ltd.

Mine water sump efficient dredging technology in the Tuen coal mines of Guo application
The Lusheng Qiang Zhu Xingmin Lee big men
Guo Tuen coal mine (1 Shandong Luneng Heze Coal and Electricity Development Co., Ltd., 274700)
(2 the Xuzhou TIANKE Machinery Manufacturing Co., Ltd., 221000)

Abstract: This paper introduces efficient Sump dredging technology and process systems. The dredging technology and its process systems the different clearance according to Guo Tuen coal mine the water positions slime distribution technologies and processes, the front of the water storage with fast loading machine for fast loading, after paragraph slime using the ZQ-IIIY / F type Shuicang automatic dredging equipment Sump slime fast dredging, dehydrated, dehydrated slime directly into the mine to the main transport system. The technology has good application prospects.
Keywords: mine water therein; concentration and dewatering; efficient dredging

1. Overview
Heze coal power Guo Tuen coal mine in Shandong Yuncheng modern standards designed annual production capacity of 2.4 million tons of mine. Mine has two working faces are being exploited, because of the abundant mine groundwater, have different degrees in 1301 and 1308 face and two boring surface of the water, the total inflow of about 600 m3 / h. Mining surface water, mining a lot of coal into the roadway ditch routed to the bottom of a well of water inside and outside positions, slime in the water inside and outside positions precipitation discharged into the water from a large pumping station Inoue. Past, Guo Tuen coal mine water positions has been in use artificial tramcar type dredging, labor, time consuming, and there is a certain degree of security risk. A serious impact on the mine yield efficient and mines of standardized construction. Kwok Tun mine the water positions slime trait distribution analysis, water storage front Inflow slime particles are relatively large, dehydration, fast loading machine for fast loading; the after paragraph slime particle diameter 0.2 mm accounted for more than 60% of the composite Sump dredging equipment dredging, slime dehydration, fast loading greatly improve the efficiency of the dredging.
2. Program to determine
2.1 Guo Tuen coal mine water storage overview
Guo Tuen mine water storage technical features table:

Sump Name	Cross-section					Positions in length (m)	The capacity of the positions in the body(m3)	Amount of Shuicang slime (m3)
	Bracing Shape	Jingkuan (m)	Wall height (m)	Clear height (m)	Net area (m2)
Within the warehouse	Semi-arched Lining for	4.0	1.1	3.3	10.28	320.00	3290	2542
Outside the warehouse	Semi-arched Lining for	4.0	1.1	3.3	10.28	400.00	4112	3475
Total							7402	6017

Note: Sump full rate of 85%

The 2.2 Shuicang manual dredging describe the situation
Guo Tuen Mine Sump width 4.0m, the lower part of the high 1.1m rectangle, the upper arched radius of 2.1m within the warehouse length 320m, outside the warehouse length 400m start dredging the water positions silt to 85% of the sections. Artificial dredging, loading coal per m 5-7 tramcar, inner position clear dig once loaded the 1600-2300 mine car, the outside positions dredging to install 2000-2800 tramcar.
Water positions dredging to about 20m after the fine grain size, coal-water separation difficult per tramcar coal even more than 1/3 of water loading difficult difficult carts, unloading difficult tramcar off road . Four or five workers in the slime water flooded the mine wheels lifted off the road, can easily result in the phenomenon of squeezing hands and feet, and insecurity.
The dredging water positions in each class need 12 workers, including: loading 6, carts, hook work 1, open a winch driver. Three shifts a day need 36 people in each class progress 6m of water inside and outside positions two months of a cycle, that is, with one month's time manually cleared dig a Sump another Shuicang basically have also been overwhelmed, but also month time dredging water positions. And often a water sump is not finished digging, another Sump emergency. Each Sump average a year dredging 6 times more labor and time-consuming, poor production safety. Cleared manually dug slime water, viscosity, and transported to the ground after unloading difficulties, occupied by industrial Plaza dry, pollute the environment, even if it is forcibly unloaded into underground the coal turned Luo, enter bottomhole coal bunker, frequently resulting in large the coal bunker clogging or Block died, affect mine production to enhance normal.
2.3 Clearance of the basic requirements of the system
The coal-water mixture into the water compartment to enter through the main roadway ditches most of the coarse particles to settle in the gutters into the water compartment particles 0.2mm or more accounted for 85% or more. Each Sump year dredging 6, slime precipitate a long time in the water compartment, a great chance of adhesive into blocks and manual dredging process often silt positions accident, a threat to the safety of miners and equipment. And artificial dredging occupy empty for a long time, the number affect the supply of mine empty.
Therefore, we have developed the clearance process systems must meet the following requirements:
(1) Solve clearance the event of silt positions to improve the security of workers and equipment.
(2) Reduce the labor intensity.
(3) Reduce the number of tramcar use to increase the utilization of the tramcar.
(4) In favor of the standardization of construction of the mine, and reduce environmental pollution.
The 2.4 clearance system equipment components
Outfit by the new MZ-Ⅰ efficient continuous loading machine, MQ-2-type self-propelled mixer truck, the ZMC Coarse extension, NB series mud and MSYZ dual workspace dewatering equipment. Completion of the the MZ-Ⅰ efficient continuous loading machine loading positions within the front-end for coarse slime; MQ-2-type self-propelled mixer truck complete stirring of the different traits slime warehouses, aggregates, pickup, transportation; ZMC Coarse extension responsible for the initial separation of the slime water, the coarse sieve slime directly by the belt transporter loading, sieve under the slime water into buffer stirred tank; the NB series mud buffer stir box slime the water injection MSYZ dewatering equipment; MSYZ dewatering equipment completed to coal slurry solid-liquid separation, cake comes belt transporter loading.
The main technical parameters:

Device Name	Type	No.	Parameters	Unit	Specification
Dewatering equipment	MSYZ	1	Handling capacity (dry material)	t/h	5-8
		2	Feeding concentration	%	≥45
		3	Discharge water	%	28-34
		4	Power	kW	11+4
		5	Recycling particles	mm	0.02-10
Self-propelled mixer truck (Gauge:600mm)	MQ-2	1	Installed power	kW	4+4
Mine slurry pump	NB15	1	Rotational speed	r/min	375
		2	Flow	m3/h	15
		3	Lift	m	60/120
Slime crude ext.	ZMC	1	Volumetric	m3	1.5
		2	Rotational speed	r/min	158
		3	Installed power	kW	2×1.1+4
The efficient continuous loading machine	MZ-Ⅰ	1	Installed power	kW	11

3. Clearance process systems design
3.1, According to the front of the water storage slime particles, dehydration good, we mainly uses fast loading machine dredging direct loading, this greatly improves the efficiency of the dredging, reduce labor intensity, improve the safety factor, to achieve hatch slime quick Cleaning dug to lay a foundation for the warehouse after paragraph slime fast dredging.
3.2 In the posterior segment slime dredging
3.2.1 Stirring, transport
Sump cleaning cycle for a month, the slime layer Sump precipitated, has formed a relatively dense sedimentary bodies, to use the water positions dredging the front of the appliance is equipped with spiral slime mixer truck, the deposition of the slime stirred spiral receiving device, containing the slime 30% -50% to the slime water collected pump suction mouth for slime dredging dedicated pump pumping, pump suction lift and high lift pumping concentration very suitable for pumping this slime water, improve pumping efficiency, which laid the foundation for efficient dewatering processing, pumping when the suction inlet of the filter with halter grate out larger particles and debris.
3.2.2 Roughly divided buffer stir
High concentrations of coal slime water through slime dredging dedicated pumps transported to a crude extension machine, large particles by high-frequency vibration sieve belt, the slime water fall into the buffer tank body, soon the slime deposited on the bottom of the tank, slime water deposited by stirring functions stir for pressure filtration pump to double workspace filter press dewatering.
3.2.3 The two pumping
After the coal slurry, stir with slime dredging the dedicated pump transported to the dewatering equipment, import and export of the pump with the hose connection, which will help plug the pipeline processing; pump power hydraulic motors with overload protection capability.
3.2.4 Dehydration, loading
The clearance process systems equipment production by Xuzhou City Tianke Machinery Manufacturing Co., Ltd.. Its core equipment is a filter press dewatering equipment, hydraulic station, belt conveyors, fixed platen, the moving platen, filter plates, fuel tanks and other components.
Dewatering equipment working principle is the filter press work, the steering hydraulic system so that the pressure oil is charged into the hydraulic cylinder, and push the piston and the intermediate plate moves forward, the multi-piece filter plate is pressed against the end plate and the intermediate plate between , then is sealed by the adjacent filter plate composed of a plurality of hollow filter chamber filter press pump coal slurry from the fixing plate of the feed tube into the filter press, when all the hollow filter chamber filled with slurry, pressure filtration process begins , coal slurry solid-liquid separation by means of the pressure generated by the pressure filtration pump. The solid particles remain in the filter chamber, and the filtrate through the filter cloth on the filter plate of the filter along the drain trench outflow filter press process time required to slime traits and the process operating conditions, when a certain pressure is reached, holding pressure, holding pressure up to the process after a predetermined time, stop feeding. When operating cylinder valve, cylinder retraction filter plates loosen, manual unloading; while the other end of the filter plate to start clamping into the next work cycle. Dual workspace filter press efficiency by 1.5 to 2 times, the company is also a major innovation.
The escape of water through the filter cloth, slime stay in the cavity of the filter plate, in order to achieve the separation of coal-water; filtered water through the sump into the vice positions, slime relieved transported through the bottom of the belt to the roadway on the main belt.
3.2.5 Block of coal slurry dam (cofferdam)
Underground Sump thousandths to five thousandths of the slope, the water level for coal slurry in a small range, easy to pump pumping in the moving car, with the operating point forward a certain distance forward block the slurry dam (cofferdam).
3.3 Device layout program
The device uses a vertical layout, do not take up roadway space, without prejudice to other equipment access.
3.4 Systems use, operation and maintenance
3.4.1 using the unit must be specified by the specially trained operating personnel to opeUate the equipment, the operator must conscientiously study manual, attend specialized training, after passing to posts.
3.4.2 Strict abnormal operation and use of equipment by equipment operating instructions should be immediately stopped. Identify the fault and removed before it can continue to operate.
Equipment should be coordinated, the 3.4.3 system startup, ensure patency before start. After stopping, static pressure of water should be used to clean the pipes to prevent pipe blockage.
3.4.4 Operating and maintenance instructions of individual equipment.
4.Run effects of process system
(1) Mechanized, streamlined continuous operation, can be a good deal of water storage in the slime.
(2) Advanced equipment and small size, and high efficiency. Host dewatering equipment using a pressure filtration principle, in the same volume of the case, the efficiency is increased to 2-3 times.
(3) Process practical, comprehensive. Normal application of equipment and fault conditions, taking into account the solution, to ensure the normal operation of the equipment, and can be resolved soon.
5. Conclusion
Mine well water positions efficient mechanical dredging technology and its process systems have achieved significant results in the successful application of Heze Coal and Electricity Company Guo Tuen coal. Especially in the front-end in the slime dredging, increasing the use of the spiral-loading machine, the water storage in the slime effective recycling; clearing dug mud water content of about 30% -32% more efficient dredging 2 -3 times the slime agitation, pumping, dewatering, loading automation and mechanization of the assembly-line. Reduce labor intensity, reduced staff inputs, shortening the clearance cycle, improve work efficiency, saving the cost of inputs. The system design of advanced technology systems, a high degree of automation equipment rational layout, the technology is in the leading position in the country, can be applied to our other mine water dug positions clear, and has broad application prospects.
References:
Zhuxing Min, ZQ-I mine water positions dredging promote the application of the process and its equipment [J] coal mining, 2003, (3) :79-80
About the author: the name Lu Shengjiang (1972.09.01), male, Han nationality, graduated from Shandong University of Science and Technology in July 2005. The incumbent the Guo the Tuen coal mines electromechanical chief, responsible for the management of mechanical and electrical equipment.