A Coal Caving System and Method for Reducing Top Coal Loss in Fully Mechanized Caving Faces

A fully mechanized caving face and working face technology, which is applied in ground mining, earthwork drilling, underground mining, etc., can solve the problems that do not take into account the shape of the top-coal discharge body and the characteristics of the interface between coal and rock, so as to achieve balanced coal caving, The effect of increasing the discharge degree and increasing the recovery rate of the top coal

CN110821493BActive Publication Date: 2022-02-22CHINA UNIV OF MINING & TECH (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-02-22

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Abstract

A coal discharging system and method for reducing top coal loss at the end of a fully mechanized caving face, mainly including the reverse sequence coal discharging method at the end, the non-causing section at the upper end, the non-causing section at the lower end, the normal sequence coal discharging section, and the reverse sequence coal discharging section and end reverse sequence coal discharge section analysis system; the end reverse sequence coal discharge method refers to dividing all coal discharge supports in the fully mechanized caving working face into positive sequence There are two coal discharge sections and reverse sequence coal discharge sections; the positive sequence coal discharge section refers to the coal discharge direction in this section is the same as the coal cutting direction of the shearer, and is adjacent to the section without coal discharge at the upper end; the reverse sequence coal discharge section refers to the coal discharge section in this section The direction of coal discharge in the section is opposite to the coal cutting direction of the shearer, and is adjacent to the section without coal discharge at the lower end; the analysis system for the reverse sequence coal discharge section at the end is installed in the section without coal discharge at the upper end to determine the length of the reverse sequence coal discharge section. A coal-drawing system and method for reducing top-coal loss at the end of a fully-mechanized caving face in the present invention is an optimization of the traditional coal-drawing process, which can effectively reduce the loss of top coal in fully-mechanized caving mining.
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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...

Examples

Embodiment 1

[0067] The present invention provides a coal-drawing 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-drawing 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 displayed by the information output module 53, it is determined that the length of the reverse sequence coal discharge section 3 is 6cm and the predicted value of the top coal recovery rate of the working face is 83%;

[0072] e. Start the coal discharge operation on the working face. ...

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] It can be seen from the above examples that the method provided by the present invention has the characteristics of less loss of top coal and high mining efficiency.