Process for instructing filling mining by observing variation of filling sensitive layer

Abstract

The invention discloses a process for instructing filling mining by observing the variation of a filling sensitive layer, which relates to the technical field of the filling mining. The process comprises the steps: (1) analyzing and determining the position and lithology of a filling sensitive layer above a filling coal face by utilizing a geophysical prospecting and drilling technology, determining rock mechanics parameters of the filling sensitive layer, and establishing a constitutive relation of the filling sensitive layer; (2) establishing a filling coal mining numerical value analysis model and a similar material simulation analysis model, predicting the relation between the variation of the filling sensitive layer and a surface protection target and a filling body filling rate, and determining maximum deflection of the filling sensitive layer when the required filling effect of the surface protection target is satisfied; (3) observing the variation of the filling sensitive layer in the filling mining process by utilizing a microseism technology in real time, instructing the filling mining in time according to the variation of the filling sensitive layer, and ensuring that the filling rate of filler can enable the deflection of the filling sensitive layer to stay in the calculated maximum value. By adopting the process, the movement of a rock layer can be effectively controlled by utilizing the minimum filling rate.

Description

technical field [0001] The invention relates to the technical field of filling coal mining. Background technique [0002] my country's long-term large-scale coal development has led to a sharp decrease in simple and easy-to-mine resources. Coal mining conditions are becoming more and more complex. The "three-down" coal mining and safety mining problems are particularly prominent. The enhancement of my country's current awareness of ecological and environmental protection also requires scientific and technological innovation. development and utilization of coal resources. Because backfill mining can reduce the degree of movement and deformation of rock formations, effectively control surface subsidence, and eliminate potential safety hazards in goafs, it has become the focus of research in the field of mine rock formation control. [0003] After years of practice and exploration, the development of coal mine filling and mining technology has become more and more mature, with ...

AI Technical Summary

Problems solved by technology

However, there are still some problems in coal mine filling mining, the main problem is the blindness of filling mining

The purpose of filling mining is to control the movement and deformation of rock formations so as to protect the control objects. Different protection objects have different protection levels, different filling effects, and corresponding filling rates. Today's coal mine filling Mining is just filling without considering the lithology and protection objects of the overlying strata, resulting in some unnecessary waste

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