Parameter determination method for bolt supporting based on roadway bearing structure
A load-bearing structure and bolt support technology, which is applied to the installation of bolts, earthwork drilling, mining equipment, etc., can solve the problems of lack of scientific and economic rationality, ambiguity and uncertainty of determination methods, and operability Insufficient and other problems, to achieve the effect of shortening the roadway design cycle, extensive practicability, and strong operability
Active Publication Date: 2013-07-10
山西潞安环保能源开发有限公司 +1
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Problems solved by technology
At present, the method of determining bolt support parameters used in China mainly applies theories such as suspension, composite beam, reinforced arch, surrounding rock loose circle, maximum horizontal stress theory, etc., and is supplemented by engineering analogy for calculation. These are all for general roadway It is often proposed that there is great ambiguity and uncertainty in the determination method, the design cycle is long, and the operability is not strong; the technical scientificity and economic rationality lack corresponding technical support
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[0033] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0034] The bolt support parameter determination method based on roadway bearing structure of the present invention comprises the following steps:
[0035] (1) According to the physical and mechanical properties, occurrence conditions and in-situ stress conditions of the surrounding rock of the roadway, the confining pressure of the surrounding rock of the roadway is obtained P 0 ;
[0036] (2) According to the required section shape and size of the roadway, the stress state of the surrounding rock and the actual engineering situation, establish a mechanical model of the load-bearing structure;
[0037] (3) Determine different support schemes and calculate the corresponding anchor bolt axial force:
[0038] a According to the roadway position, take the dynamic pressure coefficient f The value ranges from 1 to 3. When the roadway is not affected by mining...
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A parameter determination method for a bolt supporting based on a roadway bearing structure includes: selecting multiple schemes suitable for field construction conditions according to mechanical property and occurrence conditions of roadway surrounding rock and ground stress conditions, determining inter-row spacing, length and diameter of anchor bolts to be used, and selecting an optimal scheme from the schemes; designing mounting angle of the anchor bolts, bolt supporting accessories, and cable parameters according to geometrical conditions and the shape and size of roadway section; supporting a roadway according to the optimal scheme, dynamically monitoring the roadway surrounding rock during supporting, feeding back data, analyzing and correcting and optimizing the optimal scheme, and guiding and adjusting subsequent supporting for the roadway until the roadway supporting is complete. The method is suitable for roadway supporting design and is oriented from new angles. Bolt axial force is calculated through the bearing structure formed by the anchor bolts and the surrounding rock, and the roadway bolt supporting is designed. The method is scientific, reliable, practical, economical, widely applicable and highly operable.
Description
technical field [0001] The invention relates to a method for determining bolt support parameters based on roadway bearing structures, and is especially suitable for the support design of roadway bolts in underground engineering. Background technique [0002] In engineering, in order to improve the effect of bolts on roadway support and reduce the cost of roadway bolt support, it is necessary to design the parameters of bolt support. At present, the method of determining bolt support parameters used in China mainly applies theories such as suspension, composite beam, reinforced arch, surrounding rock loose circle, maximum horizontal stress theory, etc., and is supplemented by engineering analogy for calculation. These are all for general roadway The proposed method often has great ambiguity and uncertainty in the determination method, the design cycle is long, and the operability is not strong; the technical scientificity and economic rationality lack corresponding technical ...
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IPC IPC(8): E21D20/00
Inventor 张益东李晋平王东飞季明王强王悦平程亮巫林平高林生倪杰陈翔鹄邓改革张凯方江
Owner 山西潞安环保能源开发有限公司
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