Filling structure for preventing instability of filling body and mining method applying filling structure

Abstract

The invention discloses a filling structure for preventing instability of a filling body and a mining method applying the filling structure, the filling structure comprises the filling body and a sill pillar ore body, the filling body backfills a goaf above the sill pillar ore body, a buffer cushion layer is arranged at the bottom of the filling body, and the buffer cushion layer is clamped between the filling body and the sill pillar ore body. In the mining process, foam plates are used for creating a stress wave absorbing layer to prevent a filling body from losing stability, and when stoping of an upper stope is completed through an upward horizontal layered filling method and before filling is conducted, a layer of foam plates with certain strength is laid on a goaf bottom plate so that blasting stress waves can be fully reflected and absorbed in the stoping process of a sill pillar ore body, and the mining effect can be achieved. The attenuated stress waves do not cause damage to the filling body, the filling body can keep stable, the foam board does not fall off in the stoping process of the sill pillar ore body, the safety of the goaf and the stability of the filling body in the stoping process of the sill pillar ore body are guaranteed, the safety performance of the goaf of the sill pillar ore body is good, and stoping operation of the sill pillar ore body can be safely and efficiently completed.

Description

technical field [0001] The invention relates to a filling structure for preventing the instability of a filling body and a construction method thereof, belonging to mine filling protection technology. Background technique [0002] The upward horizontal layered filling method, the upward layered approach filling method and the subsequent filling mining method often leave a pillar ore body during construction to ensure the stability of the filling body, thus causing waste of resources. With the depletion of most domestic mine resources , the bottom pillar ore body must be recovered. During the mining process of the bottom pillar ore body, the filling body will produce cracks under the action of the blasting stress wave. In severe cases, problems such as roof sinking, caving, ore wall slabs will occur, which will always affect the safety and filling of the bottom pillar ore body mining area. body stability. [0003] In order to protect the stability of the filling body and th...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a filling structure and construction method for preventing the filling body from being unstable in view of the problem that the false roof of the filling body is easily damaged during the mining blasting of the bottom pillar ore body

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