Rapid rock cross-cut coal uncovering process and outburst prevention method

Abstract

The invention relates to a rapid rock cross-cut coal uncovering process and an outburst prevention method. The rapid rock cross-cut coal uncovering process comprises the following steps: performing lane drill site construction advance borehole during rock drivage period, performing penetration drilling to measure the gas pressure of the coal seam and rapidly measuring the gas content, the mechanical property of the coal and other parameters by utilizing extraction drilling and sampling under the conditions that the rock gangway construction is not influenced and the coal seam to be uncovered is subjected to gas interception and extraction in advance, and realizing the outburst danger of the multi-index prediction coal seam; increasing the specific coal and rock mass curing measures in addition to the gas outburst prevention measures with the uncovering related regulations and standard requirements, so that the rock cross-cut is excavated by employing an integrated excavator after the rock cross-cut uncovering working face is subjected to complete outburst removal, and rapid rock cross-cut coal uncovering is realized. The whole set of coal uncovering process and the outburst prevention are used for the experimental coal mine 937m roadways, and 18 layers of coal are uncovered totally, so that the whole construction period is shortened by 1.63 years and is only 1 / 3 of the expected coal uncovering time. The method is easy and convenient to operate, safe in construction, short in overall coal uncovering time and good in outburst prevention effect and has wide practicability.

Description

【Technical field】 [0001] The invention relates to a quick coal-excavation technology in Shimen, in particular to a method for predicting the risk of coal and gas outburst before coal-excavation in Shimen and preventing and controlling coal and gas outburst at a coal-excavation working face in Shimen. 【Background technique】 [0002] Coal and gas outburst is a serious natural disaster in the production process of coal mines. When it occurs, it can destroy shaft facilities and mine ventilation systems, causing coal rocks and gas to gushe out in large quantities, impacting and hurting people, coal flow burying people, and gas causing casualties. Suffocation, and even lead to severe gas and coal dust explosions, resulting in production interruption, casualties and other huge losses. [0003] Shimen unraveling of coal means that the Shimen starts from the bottom (top) slate layer 10m away from the normal line of the coal seam, and enters or passes through the top (bottom) slab of ...

AI Technical Summary

Problems solved by technology

[0009] (3) According to the current coal mining process and technical requirements, during the excavation process of the coal mining face in Shimen, the gas pumping and gas discharge measures are taken after predicting the danger of coal and gas outburst, and the waiting time in the middle is relatively long

[0010] (4) The common technique for unmasking coal in Shimen is long-distance blasting, especially when unmasking coal by blasting is likely to induce coal and gas outburst accidents

[0011] To sum up, it is imperative to study a safe and fast coal uncovering process and method, which can solve the excessive time spent by conventional coal uncovering methods

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