Pre-pumping outburst prevention technology utilizing drill hole instead of stone drift

Abstract

A pre-pumping outburst prevention technology utilizing a drill hole instead of stone drift comprises the following steps that firstly, , a pumping and exploiting drill hole and an engineering drill hole are formed in the ground through a drilling machine used on the ground, the pumping and exploiting drill hole is a vertical full hole casing pipe, the engineering drill hole comprises a vertical section, a deflecting section, a horizontal section and a horizontal fracturing section, and the casing pipe is placed into the vertical section and the deflecting section to fix a well; secondly, the horizontal fracturing section is then built after the horizontal section of the engineering drill hole and the pumping and exploiting drill hole are communicated; thirdly, high-pressure fracturing fluid is injected into a horizontal fracturing hole through a ground high-pressure pump, and a horizontal hole in the horizontal fracturing section is fractured; fourthly, a pumping and exploiting device is installed to pump and exploit coal mining lane stripe gas. The underground coal layer bottom board rock stone drift is replaced by the ground deflecting drill hole, puncturing layer hole pumping and exploiting is replaced by coal layer bottom board fracturing releasing, the ground of coal road stripe gas pre-pumping outburst prevention work of coal mine gas area comprehensive treatment is achieved, and the purpose of safe, efficient, low-consumption, energy-saving, emission-reducing and environment-friendly coal mine production is achieved.

Description

Technical field [0001] The invention relates to a coal mine tunnel excavation technology, in particular to a pre-draining and outburst prevention technology using drilling instead of tunnels. Background technique [0002] According to the national safety production policy and the requirements of comprehensive management of coal mine gas, coal seams in areas with protruding dangers must be pre-drained to prevent outbursts before mining. At present, there are two types of pre-drainage and anti-outburst technologies for comprehensive treatment of gas in outburst coal seam areas in coal mines: pre-drainage of artificial liberated layers and pre-drainage of perforated holes in floor rock roadways. [0003] Pre-drainage of artificial liberated layers: within a certain distance from the roof and floor of the coal seam with gas outburst risk, select a coal seam without outburst risk (if there is no such coal seam, a softer rock layer can be selected as the artificial liberated layer) as th...

AI Technical Summary

Problems solved by technology

[0006] (1) The investment is large, and the management cost of the Huaibei mining area reaches 150-200 yuan / ton

[0007] (2) The engineering volume of the well and roadway is large, and each working face (according to the length of the working face is 1500m) has to increase the rock roadway by about 3000m, drill more than 200,000m or recover the same area of ​​rock

[0008] (3) Complex production and auxiliary systems

[0009] (4) Lifting and ventilation burden

[0010] (5) The treatment process is all underground operations, with many sources of danger and potential safety hazards