CN101392659A - Method for directly utilizing downhole gangue - Google Patents

Abstract

The invention discloses a method for directly utilizing underground waste rocks. A waste rock pumping and treatment system is established under mine, and the underground waste rocks are directly crushed in the field, are conveyed to a stirring machine by a conveyor, are stirred evenly into a slurry state by adding water in the stirring machine, then are unloaded to a waste rock conveying pump, and are directly filled into a mined-out area through a conveying pipe. The method directly backfills the waste rocks to the mined-out area under mine, solves the reutilization problem of the underground waste rocks, and avoids a series of problems caused by long-term stacking after the waste rocks are conveyed to the ground. The method is adopted to treat the waste rocks under mine and fill the mined-out area, which can effectively reduce the settlement of a crest slab.

Description

The method that downhole gangue directly utilizes

Technical field

The present invention relates to the reutilization technology of coal mine waste rock, especially downhole gangue directly utilizes method.

Background technology

Spoil is the solid waste of association in coal production and the process, all is at present to transport to ground to deposit.A large amount of spoils are stored up ground for a long time, and land occupation causes spontaneous combustion simultaneously, atmosphere pollution and groundwater quality.The goaf is the down-hole maximum space behind the extraction coal, directly spoil is backfilling into the goaf in the down-hole, can realize that not only spoil do not go up well, does not take up an area of, and reduces environment pollution, and can reduce the surface subsidence amount, can liberate coal reserves significantly.

Summary of the invention

The present invention is for solving the technical problem that the spoil solid waste is utilized again, the method that provides a kind of downhole gangue directly to utilize.

For addressing the above problem, the technical scheme that the present invention takes is: set up pumping spoil treatment system in the down-hole, with the direct bashing of downhole gangue, concrete steps are as follows:

The first step: take supporting measure to reserve at the actual mining face goaf side and carry and fill out the cash space;

Second step: arrange a waste bin in the outside appropriate location of stope, the spoil that the down-hole produces is transported in the waste bin, at waste bin exit breaker mounting, is used to pulverize spoil;

The 3rd step: in the middle of the stope lane or on the lane mixer and spoil delivery pump are installed, fill out the cash space from spoil delivery pump to goaf and connect and go up carrier pipe;

The 4th step: spoil is broken into stone flour and granule, again spoil powder and granule is transported to mixer by conveyer, the mixer poach unloads to the spoil delivery pump after becoming pulpous state, is filled to the goaf through carrier pipe.

For making the goaf more substantial, add the blast reducer pipe in the carrier pipe termination, filling effect is better.

The present invention directly is backfilling into the goaf with spoil in the down-hole, and what solved downhole gangue utilizes problem again, has avoided spoil fortune is deposited that ground is stored up for a long time and a series of problems of bringing.And adopt this invention at the down-hole treatment spoil, bashing can effectively reduce and crush.The realization spoil is not gone up well, will produce huge economic benefit, environmental benefit and social benefit.Also can use this technology in the place of three unders in coal mining and Pillar Recovery and carry out backfill.

Description of drawings

Fig. 1 is a pumping spoil treatment system layout;

Fig. 2 is a pumping spoil treatment system flow chart.

Among the figure: 1-crushing engine, 2-charging belt, 3-mixer, 4-delivery pump, cash space, 7-waste bin, 8-stope are filled out in 5-carrier pipe, 6-goaf.

The specific embodiment

As Fig. 1, shown in Figure 2, during the invention process, at first take supporting measure to reserve and carry and fill out cash space 6 at stope 8 goaf sides, at stope 8 disposed outside one waste bin 7, the spoil that the down-hole produces is transported in the waste bin 7, at waste bin 7 exit breaker mountings 1, in the middle of stope 8 lanes or on the lane mixer 3 and spoil delivery pump 4 are installed, fill out cash space 6 from spoil delivery pump 4 to goaf and connect carrier pipe 5, arrange charging belt 2 at crushing engine 1 to mixer 3, spoil enters charging belt 2 after by crushing engine 1 fragmentation and is delivered to mixer 3, stir the back by mixer 3 and slip delivery pump 4, abandon by carrier pipe 5 and be filled to the goaf and fill out cash space 6.Add the blast reducer pipe in carrier pipe 5 terminations, make filling effect better.

The said equipment technical data is: delivery pump adopts the HBTS-16-90 type, conveying capacity 50-90t/h, fed distance: vertical 300m, horizontal 1200m, suitable particles of aggregates≤20mm, power 90kw.Two in mixer: productivity ratio 55-65m ³/ h, single-machine capacity 18.5kw.One of crushing engine, productivity ratio 60-90m ³/ h, power 75kw.One in charging belt machine, power 30kw.

Note during enforcement following some:

When carrying out the conveying of spoil pump,, must adopt high voltage bearing pipe-line system because the manifold pressure maximum can reach 8Mpa.So must adopt wall thickness is the above ultra-high pressure pipeline of 6mm, ensures the antiknock ability of pipeline.High pressure pipe clamp and high-pressure seal ring are adopted in the connection of pipeline enclosure, prevent that liquid from extruding from two pipe clamp cracks, guarantee that sealing is reliable, and the more little then transporting resistance of carrier pipe caliber is big more, and should select diameter for use is that the carrier pipe of 125mm is better.Should use bend pipe and flexible pipe less according to the spoil transportation scheme when arranging pipeline as far as possible, shorten length of pipeline as far as possible.The slump of the spoil slurry after the stirring should be controlled at 180～200mm.

The part of answering the hopper, pump chamber, conveyance conduit etc. of the moistening pump of water contact with spoil before before the turn on pump can be carried after the inspection pipeline is no abnormal.

The pump machine should be in the low-speed running state during beginning pumping, notes observing the pressure and the each several part working condition of pump, treats can bring up to normal transporting velocity after the smooth pumping.

Can cause pipeline to produce vibration when the pressure that difficulty of transportation, pump take place raises suddenly, available mallet knocks pipeline, finds out the pipeline section of obstruction, adopts positive and negative pump crawl to handle or the dismounting cleaning, confirms that on inspection not having the back of obstruction continues pumping, in order to avoid damage the pump machine.

Claims (2)

1, the method directly utilized of a kind of downhole gangue is characterized in that it is to set up pumping spoil treatment system in the down-hole, and with the direct bashing of downhole gangue, concrete steps are as follows:

The first step: take supporting measure to reserve at the actual mining face goaf side and carry and fill out the cash space;

Second step: arrange a waste bin in the outside appropriate location of stope, the spoil that the down-hole produces is transported in the waste bin, at waste bin exit breaker mounting, is used to pulverize spoil;

The 3rd step: in the middle of the stope lane or on the lane mixer and spoil delivery pump are installed, fill out the cash space from spoil delivery pump to goaf and connect and go up carrier pipe;

The 4th step: spoil is broken into stone flour and granule, again spoil powder and granule is transported to mixer by conveyer, the mixer poach unloads to the spoil delivery pump after becoming pulpous state, is filled to the goaf through carrier pipe.

2, the method directly utilized of downhole gangue as claimed in claim 1 is characterized in that, is provided with the blast reducer pipe in the carrier pipe termination.

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