Three-dimensional multifunctional experimental platform for fracture pattern and motion characteristics of under-mining overburden strata and test method using platform

Abstract

A three-dimensional multifunctional experimental platform for fracture pattern and motion characteristics of under-mining overburden strata and a test method using the platform are provided. The platform and method are applicable to the field of scientific researches on coal. The platform comprises a test table body and a strata simulator arranged above the test table body. A simulation workface bottom plate is formed at horizontal draw-out plates and cross beam positions of a vertical lifting plate; the vertical lifting plates is raised by a jack to support the simulation workface bottom plate; horizontal draw-out plates are drawn out sequentially by certain distances from one end of a support, workface width under mining below overburden strata is simulated, the horizontal draw-out plates are drawn out sequentially to stimulate proceeding of a simulation workface, and after all the horizontal draw-out plates are drawn out, the simulation of the workface mining under overburden strata is simulated; the platform is simple in structure and convenient to use, is capable of simulating and studying key layer space-time fracture pattern and motion characteristics of the under-mining overburden strata under different mining width, mining height, embedding depths and other conditions, and the reliable physical simulation model and method are provided for studying the influence of fracture pattern and motion characteristics of under-mining overburden strata upon stope mine pressure.

Description

technical field [0001] The invention relates to a three-dimensional rock stratum movement similar physical simulation experiment platform, in particular to a three-dimensional multi-functional experiment platform for mining overlying rock fracture patterns and motion characteristics, and belongs to the field of coal mining. Background technique [0002] In order to better ensure the safe production of underground mines, exploit mineral resources to the maximum extent, and protect the mining environment and ground facilities, it is necessary to grasp the mine pressure and the law of rock formation activity, which is one of the most basic researches in mining disciplines. [0003] With the development of mining engineering disciplines, three research methods, numerical simulation, physical simulation and field measurement, have been gradually formed in the process of studying mine pressure and rock formation law. Among them, the inherent period of on-site measurement is long, ...

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Problems solved by technology

[0004] At present, most of the similar simulation experiments at home and abroad are two-dimensional simulation experiments, which greatly simplify the boundary conditions of the model, and the simulation results are often quite different from the actual situation. At the same time, it is impossible to observe the mining of a certain layer. Space break feature in process

Some scholars have also conducted research on the three-dimensional similar simulation experiment platform, but the control of mining parameters such as working face width, mining height, and buried depth is relatively simple.

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