Backfill mining is widely used to control strata movement and improve the stress environment in China’s coal mines. In the present study, the effects of backfill mining on strata movement and water inrush were studied based on a case study conducted in Caozhuang Coal Mine. The in-situ investigation measured abutment pressure distribution (APD), roof floor displacement (RFD), and vertical stress in the backfill area. Results are as follows: (i) The range and peak of APD, RFD, and vertical stress in the backfill area are smaller than in traditional longwall mining with the caving method. (ii) Backfill mining could change the movement form and amplitude of overburden and improve the ground pressure environment. (iii) Floor failure depth (FFD) is much smaller in backfill mining. Backfill mining can be an effective method for floor water inrush prevention.

Mine fires are prone to cause catastrophic accidents such as gas accidents and coal dust explosions in gas-exposed coal mines, which seriously threaten the safe production of mining enterprises. In order to effectively reduce the probability of gas explosion in mines, an accurate prediction of possible fire hazards in Linhua Coal Mine is made: collecting data on fire occurrence indicators; using Weka software on the basis of rough set theory, selecting SVM classifier, BP neural network and J48 decision tree to obtain the accuracy of the samples to be tested; analyzing the detailed accuracy, confusion matrix and node error rate, and obtain the optimal algorithm. On this basis, a mine fire predictive control model is proposed to determine and control the hazard grade of mine fire source and effectively reduce the probability of coal mine fire occurrence. The establishment of this model greatly ensures the safe production of gas outburst mine.