Digging method for vein-following developing roadway of inclined stratified rock body

Abstract

The invention belongs to the field of metallic mineral deposit underground mining, i.e. for a vein-following developing roadway of an inclined stratified rock body, the invention provides a digging method with self adaptability to a rock body structure and an anchor bolt support protection mode with a view to the structure stability, so the stability of the vein-following developing roadway of the inclined stratified rock body is obviously improved. A roadway top plate obtained by using the roadway digging method provided by the invention is parallel to the bedding plane of the inclined stratified rock body, a bottom plate of the roadway is in the horizontal direction, and an upper disc upper and a lower disc upper of the roadway are respectively vertical to the bottom plate of the roadway. In order to further enhance the roadway surface layer carrying capability, waist lines of the upper disc upper and the lower disc upper are provided with anchor bolt support and protection. A metal net is arranged at an included angle part of the lower disc upper and the top plate, so clastic rocks are prevented from damaging the bottom plate through falling off from the top corner part. The stability of the roadway can be improved through the roadway shape obtained by using the roadway digging method, in addition, the process is simple, the utilization rate is high, and the method can be widely applied to the cross section design engineering of the vein-following developing roadway of the inclined stratified rock body.

Description

technical field [0001] The invention belongs to the technical field of underground mining of metal ore deposits, that is, for the quasi-vein mining roadway of inclined layered rock mass, a method for excavating quasi-vein mining roadway of inclined layered rock mass with stable structure is proposed, thereby increasing the inclination Stability of quasi-tunnels excavated along veins in high stress rock mass. Background technique [0002] The quasi-mining roadway is excavated in the developed ore deposit, according to the requirements of the mining method, in order to divide the stages into ore blocks as independent units of mining, and to form pedestrians, rock drilling, ore drawing, ventilation and other conditions in the ore blocks. Roadway works. According to the relationship between the long axis of the roadway and the direction of the ore body, the mining roadway can be divided into the mining roadway along the vein and the mining roadway through the vein, such as Fig...

AI Technical Summary

Problems solved by technology

[0003] In the mining of inclined layered and medium-thick ore bodies, the mining roadway along the vein is an indispensable mining project. However, there is no research on the influence of the inclined layered surrounding rock on the stability of the mining roadway along the vein. well resolved

The cross-sectional shape of the traditional symmetrical roadway is divided into: three-core arch, semicircle or circle, none of which can better adapt to the structural characteristics of the inclined layered rock mass. Therefore, the ability of the roadway to resist mining pressure is very weak. When encountering high ground stress, landslides and roof fall accidents often occur in traditional roadways. Sometimes, even if high-level support measures are taken, roadway damage cannot be prevented.

For example, the Chambishi Copper Mine, which adopts various high-level support measures such as smooth blasting, anchor bar pressing steel bars, spray anchor nets, and metal arches, still often occurs in quasi-tunnels along veins where pressure relief cannot be relieved. Landslide and roof fall accidents lead to a roadway utilization rate of only about 90%. Due to the damage of the roadway, a large amount of ore is often lost, which leads to a series of production problems such as tight stope connection, low production efficiency and many safety accidents.

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