Coal discharging system and method capable of reducing top-coal losses of end of fully mechanized caving face
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A technology of fully mechanized caving working face and working face, which is applied in surface mining, earthwork drilling, underground mining, etc., can solve the problems of not taking into account the shape of top coal discharge body and the characteristics of coal-rock interface.
Active Publication Date: 2020-02-21
CHINA UNIV OF MINING & TECH (BEIJING)
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[0008] The above process optimization measures are mainly considered from the perspective of field practice, without considering the shape of the top-coal discharg
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Embodiment 1
[0067] The invention provides a coal discharging system and method for reducing the loss of top coal at the top of a fully mechanized caving face. According to the geological conditions of a certain mine, the operation steps of the coal discharging process are as follows:
[0068] a. Rationally arrange the top-coal caving mining face, supporting mining, transportation and support equipment;
[0069] b. From the upper end to the lower end, number the coal discharge brackets, numbered 1, 2, ..., 10;
[0070] c. Open the analysis system 5 of the reverse sequence coal discharge section at the end, and manually input the basic information of the working face;
[0071] D, according to the information output module 53 display information, determine that the reverse sequence coal discharge section 3 length is 6cm and the top coal recovery rate prediction value of the working face is 83%;
[0072] e. Start the coal discharge operation on the working face. First, carry out the coal dis...
Embodiment 2
[0076] According to the geological conditions of a certain mine, the influence of the coal-drawing method on the top-coal discharge is analyzed.
[0077] On the same working face, the coal is discharged in two ways, the normal positive sequence and the above-mentioned method of reducing coal loss at the end of the fully mechanized caving face. The measured coal discharge of this coal discharge system is 26.89% higher than that of the normal positive sequence. , the loss of overhead coal at the lower end was reduced by 13.98%.
[0078] As can be seen from the above examples, the method provided by the invention has the characteristics of less top coal loss and high mining efficiency.
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Abstract
The invention discloses a coal discharging system and method capable of reducing top-coal losses of the end of a fully mechanized caving face. The system mainly comprises an end inverted sequence coaldischarging manner, an upper end non-coal-discharging segment, a lower end non-coal-discharging segment, a positive sequence coal discharging segment, an inverted sequence coal discharging segment and an end inverted sequence coal discharging segment analysis system. According to the end inverted sequence coal discharging manner, all coal discharging supports, except for the upper end non-coal-discharging segment and the lower end non-coal-discharging segment, in the fully mechanized caving face are divided into the positive sequence coal discharging segment and the inverted sequence coal discharging segment; according to the positive sequence coal discharging segment, the coal discharging direction in the segment is the same with the coal cutting direction of a coal mining machine, and is adjacent to the upper end non-coal-discharging segment; according to the inverted sequence coal discharging segment, the coal discharging direction in the segment is opposite to the coal cutting direction of the coal mining machine, and is adjacent to the lower end non-coal-discharging segment; and the end inverted sequence coal discharging segment analysis system is mounted on the upper end non-coal-discharging segment and used for determining the length of the inverted sequence coal discharging segment. According to the coal discharging system and method capable of reducing the top-coal losses of the end of the fully mechanized caving face, the traditional coal discharging process is optimized, and the top-coal loss amount of full-mechanized caving mining can be effectively reduced.
Description
technical field [0001] The invention relates to the technical field of comprehensive mechanized top coal caving mining, in particular to a coal caving system and method for reducing the loss of top coal at the end of a fully mechanized caving face. Background technique [0002] Since the introduction of fully mechanized caving mining technology in my country in the 1980s, it has been rapidly popularized in my country's thick coal seam mining due to its advantages of small roadway excavation, strong geological adaptability, and multi-point coal extraction. In engineering practice, secondary innovation and development have been carried out, and a series of important achievements have been made, such as fully mechanized caving with large mining height in extra-thick coal seams, and fully mechanized caving in steeply inclined coal seams towards longwall. For quite a long time in the future, fully mechanized caving mining will still be one of the important technical approaches for...
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