Goaf filling space detection method under coal mine fully mechanized caving mining process condition

Abstract

The invention provides a goaf filling space detection method under a coal mine fully mechanized caving mining process condition, which comprises the following steps of: detecting the formation withina range of 20-100m by adopting a high-density electrical method, detecting the formation within a range of 100-300m by adopting a transient electromagnetic method, and obtaining a vertical grading detection result by adopting a combined apparent resistivity inversion method. According to the method, the vertical detection depth difference of a high-density electrical method and a transient electromagnetic method is considered, a combined apparent resistivity inversion method is adopted to carry out vertical grading detection on the filling space under the coal mine fully mechanized caving conditions, and cavities, cracks and the like of caving zones and fissure zones of the goaf are revealed. The method can be used for the space size and distribution condition of coal gangue particle-levelfilling so as to solve the problem that it is difficult to quantitatively estimate the goaf filling space under the coal mine fully mechanized caving technological condition and improve the detectionprecision.

Description

Technical field[0001]The invention relates to a coal mining filling technology, in particular to a method for detecting the filling space of a goaf under the conditions of a fully mechanized caving coal mining process.Background technique[0002]my country's coal mine filling mining has become the main trend of green and efficient mining of coal mines. Among them, coal mining filling technology can be divided into fully mechanized mining technology filling technology and fully mechanized caving technology filling technology. The filling technology under the fully mechanized mining process is relatively mature, and the filling is only limited to the goaf behind the coal mining face, and there is almost no demand for the exploration of the fillable space; the filling technology under the fully mechanized caving process is still in its infancy, filling the space Including the mined-out area and the upper caving zone, there is a greater demand for the exploration of fillable space.[0003]F...

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Problems solved by technology

Each of the above detection methods has its own limitations and cannot obtain high detection accuracy

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