Simulation Method for the Expansion Effect of Collapsing Gangue in Goaf
A simulation method and goaf technology, applied in the mining field, can solve the problem that caving layers cannot be truly simulated
Active Publication Date: 2021-03-19
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology
[0006] The purpose of this disclosure is to provide a simulation method for the collapse effect of goaf collapsed gangue, which overcomes the problem that the collapsed layer cannot be simulated in a similar simulation test, and is more conducive to the study of the surrounding rock of the stope after coal seam mining. Stress distribution and deformation failure
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[0047] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure.
[0048] The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, on...
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The invention relates to the technical field of mining, in particular to a simulation method of a goaf caving gangue crushing and expanding effect. The simulation method comprises the steps that the size of a first similar layer of a simulated floor rock stratum, the size of a second similar layer of the simulated coal seam, the size of a broken and expanded similar layer of the simulated caving layer and the size of a third similar layer of a simulated overlying strata roof rock stratum are determined; according to the rock breaking expansion coefficient of the caving layer, the rock particlesize, grading and bonding parameters in the breaking expansion similar layer are determined; a first similar layer, a second similar layer, a broken and expanded similar layer and a third similar layer are sequentially laid on the test bed; and the second similar layer is excavated to form a simulated goaf, so that the broken and expanded similar layer collapses into the simulated goaf to form caved gangue. According to the simulation method, the problem that the caving layer cannot be truly simulated in an analog simulation test is solved, and research on stress distribution and deformationdamage of stope surrounding rock after coal seam mining is facilitated.
Description
technical field [0001] The present disclosure relates to the technical field of mining, and in particular to a method for simulating the crushing and expansion effect of collapsed gangue in a goaf. Background technique [0002] The similarity simulation method refers to making a model similar to the prototype in the laboratory according to the similarity principle, and observing the mechanical parameters and distribution laws of the model with the help of testing instruments, and then using the research results of the model to infer the possible mechanical phenomena and rock formation in the prototype. The law of body pressure distribution can be used to solve practical problems in rock mass engineering. Due to the simplification of engineering geological conditions and the ability to study engineering problems in the laboratory, the similarity simulation method is widely used in the field of underground engineering. [0003] In the process of coal mining using longwall min...
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IPC IPC(8): G09B25/00
CPCG09B25/00
Inventor 王亚军王浩森王琦何满潮杨军田喜春薛浩杰
Owner CHINA UNIV OF MINING & TECH (BEIJING)