Design method of anchor bolt support in coal mine roadway
A technology of bolt support and design method, applied in mining equipment, bolt installation, calculation, etc., can solve the problems of not being able to fully display the actual situation of a large range of surrounding rocks, inaccurate configuration of bolt parameters, etc. The effect of avoiding mechanical calculation, saving support cost and simplifying calculation method
Inactive Publication Date: 2018-01-16
宁夏建设职业技术学院
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However, this method has strong limitations and cannot comprehensively display the actual situation of a large range of surrounding rocks, so the configuration of the bolt parameters is not accurate.
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[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0028] After the excavation of the roadway cannot be supported instantaneously, the roof of the roadway will be deformed. Within a certain range, the unit body of the roof surrounding rock is under tensile stress, and the unit body in the roadway roof is composed of unit bodies whose tensile stress is greater than zero. The rock mass is a potentially hazardous rock mass, as shown in reference 1. The connection of the stress unit with zer...
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The invention relates to a design method of an anchor bolt support in a coal mine roadway. The design method of the anchor bolt support in the coal mine roadway comprises the following steps that firstly, the width W0 of the top of the roadway and the vertical ground pressure p0 of the top of the roadway are measured; secondly, a roadway section curve equation is established according to the widthW0 of the top of the roadway and the vertical ground pressure p0 of the top of the roadway; and thirdly, the length of a roadway anchor bolt is calculated according to the roadway section curve equation. According to the design method of the anchor bolt support in the coal mine roadway, the roadway section curve equation is established according to the width W0 of the top of the roadway and the vertical ground pressure p0 of the top of the roadway, and then the length of the roadway anchor bolt is calculated according to the roadway section curve equation, so that the self-bearing and self-stabilizing capacity of surrounding rock is sufficiently utilized, and the defects of traditional support design based on inaccurate rock parameters are overcome.
Description
Technical field [0001] The invention belongs to the technical field of coal mine roadways, and specifically relates to a design method for bolt support of coal mine roadways. Background technique [0002] Anchor support is a systematic project, which involves design, construction, support materials, measured technical means and other aspects. Bolt support design is a key technology in bolt support engineering, which is related to important issues such as the quality of the bolt support engineering, whether it is safe and reliable, and whether the economy is reasonable. If the bolt support form and parameter selection is unreasonable, it will often cause two extremes, that is, either the roadway support strength is not enough, and the deformation of the surrounding rock cannot be effectively controlled, which will lead to accidents such as roof fall and side slope of the roadway; or roadway support strength Too high not only wastes supporting materials, but also reduces the speed...
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Inventor 王博
Owner 宁夏建设职业技术学院