Will coal mining cause soil erosion?
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During the coal mining production process, the goaf range is continuously expanded, forming a peak of water in the whole mining process. The surface water is rapidly converted to groundwater, and the groundwater body is changed from the original lateral movement to the longitudinal movement, destroying the shallow water source. , seriously affected the industrial and agricultural water use. The surface runoff is significantly reduced, and the groundwater level is greatly reduced, resulting in a series of problems such as cracking of building buildings, water subsidence on the ground, sinking of river banks, reduced flood discharge capacity, and spring water cutoff.
Example: In 1994, the well-known Jinci Difficult Spring was shut down due to over-exploitation of coal. The pollution of surface water by coal mining mainly through two ways: mine drainage and leaching of vermiculite directly cause pollution to surface water flow. The pit water not only mixes a large amount of coal dust and harmful elements, but also is seriously polluted by underground rotted pit wood and oil. After being discharged from the surface, the river water flow is directly polluted. Gangue rich in soluble ions, in particular heavy metal ions, in the surface water and groundwater erosion, leaching, can easily migrate to the water pollution.