A Method for Prevention and Control of Rockburst in Shuangshangshan Mining

Abstract

The invention provides a method for preventing and controlling rockburst by double uphill mining. Mine houses are arranged in the ore body. Tunneling through the contact roadway; reserve the position of the top column, retreat from top to bottom, from both sides inward, and use electric rake winch to extract the ore; and then go up the mountain along the two cuttings, leave the bottom column, and The recovery of the remaining ore in the mine is completed; after the ore is mined, the next mine is arranged adjacent to the direction of the transport roadway, and the mining operation of the next mine is continued according to the above process. Compared with the traditional single uphill process, the two-cut uphill process (hereinafter referred to as double uphill) process jointly bears the destructive strength of the rock burst on the surrounding rock of the mine during the excavation process through two uphills, and releases the stress borne by the original single uphill at multiple points, reducing The rockburst phenomenon is caused by the sudden instability and failure due to the strength of the surrounding rock of the mine house that cannot adapt to the concentrated excessive stress.

Description

technical field [0001] The invention relates to a mining method under the condition of special engineering geological structure, especially an underground mine with serious ground pressure, in order to ensure the safety of mining and improve the recovery rate. Background technique [0002] The room-and-pillar mining method has the characteristics of simple mining process, good ventilation, and low ore dilution rate. In the past two decades, due to the rapid development of tire-type and crawler-type rock drilling, loading, and handling equipment, it has reached a level near the level. For thicker ore deposits, the room-and-pillar method combined with trackless equipment can be used to realize large-scale mechanized mining, which greatly improves the production capacity of the mine, so it is widely used in underground mines at home and abroad. In the process of mining, the rock layer is in the original stress state before the mining of the ore seam, and the original balance st...

AI Technical Summary

Problems solved by technology

In the process of mining, the rock layer is in the original stress state before the mining of the ore seam, and the original balance state of the surrounding rock is destroyed after mining. Rockburst will occur when the brittleness and elasticity are high, especially as the mining depth continues to increase, the stress will increase, and the rockburst phenomenon is particularly severe. Workers exposed to the rockburst roof will have great production safety hazards. In addition, Rockburst often causes serious damage to the excavation face and equipment damage, which has become a worldwide problem in the field of underground engineering and rock mechanics

[0003] The traditional room-and-pillar mining method generally adopts the reserved mine wall method in areas with large buried depths and significant rockbursts. By controlling the exposed area of ​​the mine roof and reducing the stress of the surrounding rock, this method has a better effect in preventing rockbursts. But the disadvantage is that the recovery rate is too low, generally only 60%, which is a serious waste of resources

In terms of rockburst control, the existing prevention and control measures are mainly to strengthen the support and advance support of the surrounding rock, soften the rock with water, improve the rock properties, smooth blasting, etc. The advantage is that it can improve and alleviate the rockburst phenomenon to varying degrees. The disadvantage is that the construction process is complicated, the cost is high, and the output is affected.

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