CN102606175A - Method for plugging confined water in underground coal mine sandstone crack - Google Patents

Abstract

The invention discloses a method for plugging confined water in an underground coal mine sandstone crack. The method comprises the steps of selecting the transient electromagnetic technology to detect enriched water pressure of a lane in advance; secondly, forcibly plugging a main water outlet point of a receiving head by a two-fluid-grouting method so as to prevent grouting fluid from running out of the water outlet point in the next grouting; thirdly, constructing an enriched water area explored by early-stage transient electromagnetism by using a drilling machine, grouting and drilling a deep part, grouting from the inside to the outside and from the shallow to the deep in a three-dimensional manner until the cracks in the enriched water area are fully injected; and fourthly, constructing the lane after the grouting, arranging a chamber at the position without affecting the normal construction after the lane passes through the enriched water area safely, and constructing a water discharging hole in the chamber so as to discharge water. According to the method, the water discharge cost is saved for a coal mine, and the valuable experience is provided for the prevention and control of the confined water in the sandstone crack of a top plate, so that the method has a broader social promotion prospect.

Description

Sandstone crack artesian water method for blocking under the coal mine

Technical field

The present invention relates to the technology of harnessing the river under the coal mine.

Background technology

The substrate in Permo-carboniferous period coalfield, China North China is the Middle Ordovician series carbonate rock; Coal measure strata is mainly fluvial facies and the foot of a mountain of Cenozoic flusch bottom towards diluvium facies gravel aquifer, in exploitation, is faced with the water damage problem that the water yield is big, hydraulic pressure is big, the quiet reserves in water source are big during the group coal.

For example; The colliery, Shandong is positioned at the north, the Yellow River, and its two exploiting field two is adopted air intake and gone up a hill from water outlet on May 29 in 2008, wherein is positioned at the left side shoulder nest EXIT POINT max water yield 150m3/h of place that meets head on; The whole max water yield 224m3/h that meets head on; The hydraulic pressure maximum reaches 3MPa, causes the tunnel to construct, and stops driving.To just water blockoff success on September 19th, 2008, the 110 days water outlet time of accumulative total,, 468700 cubes of accumulative total water yields belong to typical top board sandstone crack water damage type.

At present, for water outlet general under the coal mine the most effectively improvement method be respectively: the one, the two fluid grouting method of drilling, in actual implementation process because the water yield is big, hydraulic pressure is big, cranny development, and it is serious to run slurry, DeGrain, it is controlled that water outlet does not have; The 2nd, build the waterwall method, this method operating expenses is bigger, and the construction period is long, can't satisfy actual needs.

Summary of the invention

The objective of the invention is to overcome the existing anti-defective of harnessing the river that technique effect is not obvious, operating expenses is big, the construction period is long and can't satisfy actual needs, provide a kind of spy, stifled, annotate the anti-technology of harnessing the river of the Trinity+the dredge sandstone crack artesian water method for blocking that integrated control water technology is implemented.

For achieving the above object, water seal blocking method step of the present invention is following:

The first step: select the rich hydraulic pressure in transient electromagnetic technology forward probe tunnel for use

Transient electromagnetic method or title TDEM (Time domain electromagnetic methods); Be called for short TEM, it is to utilize earth-free loop line or ground connection line source to underground emission pulsatile once magnetic field, the tempus intercalare in pulsatile once magnetic field; Utilize the method in coil or earthing electrode observation secondary vortices flow field; Effectively survey the latent moisture anomalous body in underground tunneling roadway the place ahead, draw a circle to approve out water enrichment area, marked the cranny development direction; Briefly, the basic principle of transient electromagnetic method is exactly the law of electromagnetic induction; Transient electromagnetic method have range finding big, to advantages such as water sensitive, directionality are good, can effectively survey underground tunneling roadway the place ahead and lie concealed moisture anomalous body, draw a circle to approve out water enrichment area, marked the cranny development direction, successfully administer water damage for next step and lay a good foundation.

Second step: the main EXIT POINT of will meeting head on uses the two fluid grouting method to block by force, and injection slurry is run out of from EXIT POINT when preventing next step slip casting.

At first according to meeting head on size, the degree of depth in crack; The Grouting Pipe of processing different size, and adopt cotton yarn to add accelerating admixture on every side to Grouting Pipe and carry out preliminary treatment, the main EXIT POINT of meeting head on is carried out preliminary two fluid grouting shutoff; Spillage when preventing to carry out deep slip casting improves slip casting effect.

The 3rd step: use the rich pool construction deep inlet well of rig, carry out from outside to inside three-dimensional slip casting from shallow to deep to transient electromagnetic exploration in early stage; Reality is all annotated in crack, rich pool; Tunnel intensity is increased by force greatly, and fissure-plane is annotated reality basically, has possessed the condition that continues driving.

The 4th step: construction tunnel after the slip casting, treat that tunnel safety has passed rich pool after, open chamber in the place that does not influence normal construction, white-out water is carried out in the dewatering orifice of in chamber, constructing, to reach the purpose of disperse the to meet head on water yield, hydraulic pressure.

Advantage of the present invention is:

1, the construction period is short.The Shandong coal adopts this technology, only in less than 3 months time, meets head on just possessed the condition that continues construction, has alleviated full ore deposit greatly and has produced the nervous situation that continues.

2, technological input cost is low, the achievement instant effect.Coal utilization this technology in Shandong is investigated the water blockoff success from early stage; Input cost is about 200,000 yuan altogether; Well below the expense of punching slip casting (1,200,000) and beating waterwall (500,000) from ground, but quick result, from beginning slip casting to possessing normal driving condition; Only use less than the trimestral time, reached the requirement of small investment, instant effect.

3, the social benefit that produces

The successful Application of this technology is not merely the colliery and has practiced thrift the draining cost, and for preventing and treating top board sandstone crack artesian water later on valuable experience is provided, and has than the wide society promotion prospect, and the social benefit of generation also is huge.

The specific embodiment

Be that example further specifies technical scheme with Jiyang, Shandong mine below.

2010, the big lane of wing return air, west, the big lane of this development disclosed pool, pressure-bearing Shuifu County, sandstone crack when tunneling to preceding 40 meters of W40# traverse station, and the tunnel can't ordinary production, influences the construction that big lane is opened up in mine three exploiting fields.To above situation; The present invention's " visit, stifled, annotate " Trinity technology+dredge integrated control water technology of harnessing the river is adopted in this ore deposit; At first adopt the transient electromagnetic technology that the place ahead, tunnel is explored, thereby draw a circle to approve 40 ° of directions of place, main water source back and 20 ° of directions, adopt Grouting Pipe that the tunnel main EXIT POINT of meeting head on has been carried out the slip casting shutoff then; Arrange boring in the back of meeting head on again, pre-grouting has been carried out in main nourishment source reinforced shutoff.Utilization through this practical technique; The tunnel water yield is reduced rapidly, realized the shutoff to the nourishment source, the time less than one month has only been used in front and back; Make tunnel safety pass rich pool; Then,, guarantee not influence other job site with the water drainage in the construction dewatering orifice, place that does not influence normal construction.

Claims (1)

1. sandstone crack artesian water method for blocking under the coal mine is characterized in that step is following:

The first step: select the rich hydraulic pressure in transient electromagnetic technology forward probe tunnel for use

Transient electromagnetic method is to utilize earth-free loop line or ground connection line source to underground emission pulsatile once magnetic field; The tempus intercalare in pulsatile once magnetic field; Utilize the method in coil or earthing electrode observation secondary vortices flow field; Effectively survey the latent moisture anomalous body in underground tunneling roadway the place ahead, draw a circle to approve out water enrichment area, marked the cranny development direction;

Second step: the main EXIT POINT of will meeting head on uses the two fluid grouting method to block by force, and injection slurry is run out of from EXIT POINT when preventing next step slip casting; At first according to meeting head on size, the degree of depth in crack; The Grouting Pipe of processing different size, and adopt cotton yarn to add accelerating admixture on every side to Grouting Pipe and carry out preliminary treatment, the main EXIT POINT of meeting head on is carried out preliminary two fluid grouting shutoff; Spillage when preventing to carry out deep slip casting improves slip casting effect;

The 3rd step: use the rich pool construction deep inlet well of rig, carry out from outside to inside three-dimensional slip casting from shallow to deep to transient electromagnetic exploration in early stage; Reality is all annotated in crack, rich pool; Tunnel intensity is increased by force greatly, and fissure-plane is annotated reality basically, has possessed the condition that continues driving;

The 4th step: construction tunnel after the slip casting, treat that tunnel safety has passed rich pool after, open chamber in the place that does not influence normal construction, white-out water is carried out in the dewatering orifice of in chamber, constructing, to reach the purpose of disperse the to meet head on water yield, hydraulic pressure.