Method for determining onboard ventilation and dust removal treatment air volume of coal mining machine

Abstract

The invention belongs to the field of mine ventilation air volume calculation, and particularly relates to a method for determining onboard ventilation and dust removal treatment air volume of a coal mining machine. Comprising the steps that a machine body ventilation dust remover or a machine-mounted ventilation dust removal system is arranged on the coal mining machine, and the air inlet and outlet direction of the machine body ventilation dust remover is consistent with the air inlet direction in a fully-mechanized coal mining face; the air inlet position of an upwind side dust remover in the airborne ventilation and dust removal system is located at an upwind side roller, and exhausted air passes through an upwind side air guide device, then points to a top plate and deviates to the downwind side; the air inlet speed of the fully mechanized coal mining face is determined, the air volume blocked by the coal mining machine is determined according to the sectional area of the coal mining machine, and the air volume blocked by the coal mining machine is the air volume needing to be treated by the machine body ventilation dust remover or the windward side dust remover. According to the invention, wind introduced into the fully mechanized coal mining face is prevented from being blocked by a coal mining machine, so that coal dust is prevented from transversely diffusing towards a pedestrian side, and the occupational health of operators is protected. The calculation method is simple, the accuracy is high, and the airborne ventilation volume can be rapidly determined.

Description

Technical Field

[0001] The invention belongs to the field of mine ventilation air volume calculation (E21F5 / 00, E21F1 / 00), and in particular relates to a method for determining the air volume of ventilation and dust removal treatment onboard a coal mining machine. Background Art

[0002] The dust produced by coal mining is the main continuous dust source in the fully mechanized mining face. When the coal mining machine cuts coal, the drum pick cuts, squeezes and rubs the coal body, which produces a large amount of fine coal dust. The instantaneous concentration of coal dust exceeds 1000mg / m 3 , and quickly spreads horizontally to the pedestrian side under the wind flow and the blocking effect of the coal mining machine, affecting the vision and occupational health of the operators. The dust produced by the coal mining machine when cutting coal has the characteristics of large instantaneous dust production and easy diffusion. Once the coal dust spreads, it is difficult to control. The traditional control method is to use the spray dust reduction method. This method has limited dust reduction efficiency and also has a certain impact on the vision near the coal mining machine drum and the comfort of the operators. Therefore, it is difficult to achieve the ideal purpose in the actual engineering application process. Ventilation and dust removal can meet the requirements of rapid dust suction and vision at the same time, which is an important development direction for the control of coal mining machine dust produced by cutting coal. However, in order to achieve a better dust control effect by using the airborne ventilation and dust removal method, the air volume handled by the airborne ventilation and dust collector is the key. Only by reducing the wind flow that spreads horizontally due to the obstruction of the coal mining machine can the lateral diffusion of coal dust be reduced. However, there is currently no reliable method to determine the air volume of the airborne ventilation and dust removal of the coal mining machine. Therefore, it is necessary to invent a method for quickly calculating the air volume of the airborne ventilation and dust removal of the coal mining machine, so as to provide a theoretical calculation basis for the use of airborne dust removal of the coal mining machine. Summary of the invention

[0003] In view of the above technical problems, the present invention proposes a method for determining the air volume of ventilation and dust removal treatment on a coal mining machine, comprising the following steps:

[0004] S1: Arrangement of fuselage ventilation dust collector

[0005] A machine body ventilation dust collector is arranged on the main body of the coal mining machine, and the air inlet and outlet directions of the machine body ventilation dust collector are consistent with the air inlet direction in the fully mechanized mining working face;

[0006] S2: Determine the air volume required for the machine body ventilation dust collector, including

[0007] S21: Determine the air velocity at the fully mechanized mining face

[0008]

[0009] Where, v0 is the air velocity of the fully mechanized mining face, m / min; Q is the air volume of the fully mechanized mining face, m 3 / min; S is the cross-sectional area of ​​the fully mechanized mining face, m 2; D is the top control distance of the fully mechanized mining face, m; β is the angle between the hydraulic support shield beam and the bottom plate, °; H is the mining height of the fully mechanized mining face, m;

[0010] S22: Determine the air volume required for the machine body ventilation dust collector

[0011] Q c =ahv0 (3)

[0012] In the formula, Q c is the air volume required by the machine body ventilation dust collector, m 3 / min; a is the width of the coal mining machine, m; h is the height of the coal mining machine, m.

[0013] The present invention also proposes another method for determining the air volume of ventilation and dust removal treatment on a coal mining machine, comprising the following steps:

[0014] S1: Arrangement of airborne ventilation and dust removal system

[0015] The airborne ventilation and dust removal system comprises an upwind dust collector, a downwind dust collector, an upwind air guide device and a downwind air guide device arranged on the coal mining machine; the upwind dust collector and the downwind dust collector are used to process the coal dust generated by the upwind drum and the downwind drum when cutting coal respectively; the upwind air guide device and the downwind air guide device are arranged in sequence along the length direction of the coal mining machine; the upwind air guide device and the downwind air guide device are connected to the outlets of the upwind dust collector and the downwind dust collector respectively, and the upwind air guide device and the downwind air guide device are provided with air outlets; the wind discharged from the air outlet is directed to the top plate and deviates to the downwind side;

[0016] S2: Determine the air volume required for the airborne ventilation and dust removal system, including

[0017] S21: Determine the air velocity at the fully mechanized mining face

[0018]

[0019] Where, v0 is the air velocity of the fully mechanized mining face, m / min; Q is the air volume of the fully mechanized mining face, m 3 / min; S is the cross-sectional area of ​​the fully mechanized mining face, m 2 ; D is the top control distance of the fully mechanized mining face, m; β is the angle between the hydraulic support shield beam and the bottom plate, °; H is the mining height of the fully mechanized mining face, m;

[0020] S22: Determine the air volume required for the upwind ventilation and dust removal system

[0021] Q c =ahv0 (3)

[0022] In the formula, Q cThe air volume blocked by the coal mining machine is also the air volume required to be processed by the upwind ventilation dust collector, m 3 / min; a is the width of the coal mining machine, m; h is the height of the coal mining machine, m.

[0023] Preferably, the air inlet of the upwind ventilation dust collector is connected to an upwind dust hood, and the air inlet of the leeward ventilation dust collector is connected to a leeward dust hood.

[0024] Preferably, the sum of the lengths of the upwind side wind guide device and the downwind side wind guide device is not less than the length of the coal mining machine body.

[0025] Preferably, the air volume required to be processed by the downwind side ventilation dust collector is determined according to the dust production of the corresponding drum.

[0026] Beneficial technical effects: 1. The method for determining the air volume for onboard ventilation and dust removal of a coal mining machine of the present invention is suitable for the ventilation and dust removal treatment of coal dust generated by coal mining machines cutting coal in the fully-mechanized mining working face underground in coal mines. The calculation method is simple and highly accurate, and can quickly determine the onboard ventilation air volume, providing a basis for the selection and use of a fuselage ventilation and dust collector or an onboard ventilation and dust removal system. The present invention can effectively reduce the lateral diffusion of coal dust generated by coal mining machines cutting coal, and protect the occupational health of operators.

[0027] 2. The present invention realizes two functions simultaneously by providing an air guide device: quickly extracting and purifying the coal dust at the drum of the coal mining machine and preventing the coal dust near the coal mining machine body from spreading to the pedestrian side, thereby improving the comfort of the operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a side view of the arrangement of an airborne ventilation dust collector according to a first embodiment of the present invention;

[0029] Figure 2 This is a front view of the airborne ventilation and dust removal system according to the second embodiment of the present invention;

[0030] Figure 3 A top view of the airborne ventilation and dust removal system according to the second embodiment of the present invention;

[0031] In the figure: upwind side ventilation dust collector 1; upwind side dust hood 2; downwind side ventilation dust collector 3; downwind side dust hood 4; upwind side air guide device 5; downwind side air guide device 6; coal mining machine 7, air outlet 8; body ventilation dust collector 9; hydraulic support 10. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Embodiment 1

[0034] like Figure 1As shown, the present invention proposes a method for determining the air volume for ventilation and dust removal treatment on a coal mining machine, comprising the following steps:

[0035] S1: Arrangement of coal mining equipment and machine body ventilation dust collector for fully mechanized mining face

[0036] The coal mining equipment includes a coal mining machine 7 and a hydraulic support 10. The coal mining machine 7 is located in the support space formed by the hydraulic support 10. The arrangement of the coal mining machine 7 and the hydraulic support 10 in the fully-mechanized mining face is common knowledge in the art and will not be described in detail here. A body ventilation and dust collector 9 is provided on the main body of the coal mining machine 7. The air inlet and outlet directions of the body ventilation and dust collector 9 are consistent with the length direction of the fully-mechanized mining face and the air inlet direction in the fully-mechanized mining face.

[0037] S2: Determine the air volume required to be processed by the machine body ventilation dust collector 9, including

[0038] S21: Determine the air velocity at the fully mechanized mining face

[0039]

[0040] Where, v0 is the air velocity of the fully mechanized mining face, m / min; Q is the air volume of the fully mechanized mining face, m 3 / min; S is the cross-sectional area of ​​the fully mechanized mining face, m 2 ; D is the top control distance of the fully mechanized mining face, m; β is the angle between the hydraulic support shield beam and the bottom plate, °; H is the mining height of the fully mechanized mining face, m;

[0041] S22: If the wind entering the fully mechanized mining face is not blocked by the coal mining machine 7, causing the coal dust generated by the coal mining machine 7 to spread laterally to the pedestrian side, then the wind volume passing through the coal mining side where the coal mining machine 7 is located should remain unchanged, that is, the machine body ventilation dust collector 9 should suck in and discharge the wind blocked by the coal mining machine 7, thereby ensuring that the wind entering the fully mechanized mining face does not change on the coal mining side and the pedestrian side along the entire length of the fully mechanized mining face; the wind volume blocked by the coal mining machine 7 can be determined to obtain the wind volume that the machine body ventilation dust collector 9 needs to handle

[0042] Q c =ahv0 (3)

[0043] In the formula, Q c The air volume blocked by the coal mining machine is also the air volume required to be processed by the machine body ventilation dust collector, m 3 / min; a is the width of the coal mining machine, m; h is the height of the coal mining machine, m.

[0044] The method for determining the air volume for onboard ventilation and dust removal treatment of a coal mining machine in embodiment 1 of the present invention is suitable for the ventilation and dust removal treatment of coal dust generated by coal mining machines cutting coal at the fully-mechanized mining face in underground coal mines. The calculation method is simple and highly accurate, and can quickly determine the onboard ventilation air volume, providing a basis for the selection and use of the ventilation and dust collector of the fuselage. The present invention can effectively reduce the lateral diffusion of coal dust generated by coal mining machines cutting coal, and protect the occupational health of operators.

[0045] Embodiment 2

[0046] The present invention also proposes another method for determining the air volume of ventilation and dust removal treatment on a coal mining machine, comprising the following steps:

[0047] S1: Arrangement of coal mining equipment and airborne ventilation and dust removal system at fully mechanized working face

[0048] The arrangement of the coal mining equipment in the second embodiment is the same as that in the first embodiment. Figure 1 The coal mining equipment includes a coal mining machine 7 and a hydraulic support 10. The coal mining machine 7 is located in the support space formed by the hydraulic support 10. The arrangement of the coal mining machine 7 and the hydraulic support 10 in the fully mechanized mining face is common knowledge in the art and will not be described in detail here.

[0049] like Figure 2-3 As shown, the airborne ventilation and dust removal system includes an upwind ventilation and dust collector 1 and a downwind ventilation and dust collector 3 arranged on the coal mining machine 7; the air inlet of the upwind ventilation and dust collector 1 is connected to the upwind dust hood 2, and the upwind dust hood 2 is located at the upwind drum of the coal mining machine 7, and is used to absorb the coal dust generated by the upwind drum of the coal mining machine 7 cutting coal; the air inlet of the downwind ventilation and dust collector 3 is connected to the downwind dust hood 4, and the downwind dust hood 4 is located at the downwind drum of the coal mining machine 7, and is used to absorb the coal dust generated by the downwind drum of the coal mining machine 7 cutting coal; it also includes an upwind air guiding device 5 and a downwind air guiding device 6 arranged on the coal mining machine 7, and the upwind air guiding device 5 and the downwind air guiding device 6 are arranged in sequence along the length direction of ... 6 is not less than the fuselage length of the coal mining machine 7; the upwind side air guide device 5 and the downwind side air guide device 6 are respectively connected to the outlets of the upwind side ventilation dust collector 1 and the downwind side ventilation dust collector 3, and the upwind side air guide device 5 and the downwind side air guide device 6 are provided with an air outlet eye 8, the upwind side ventilation dust collector 1 discharges the purified air through the air outlet eye 8 of the upwind side air guide device 5, and the downwind side ventilation dust collector 3 discharges the purified air through the air outlet eye 8 of the downwind side air guide device 6; the air discharged from the air outlet eye 8 points to the top plate and slightly deviates to the downwind side, with a deflection angle of 10-25°, thereby forming a wind curtain at the coal mining machine 7, which physically separates the mining section of the comprehensive mining face into the pedestrian side and the coal mining side at the position of the coal mining machine 7, and can prevent the coal dust generated by coal mining on the coal mining side from entering the pedestrian side;

[0050] S2: Determine the air volume required for the airborne ventilation and dust removal system

[0051] The method for determining the required air volume for the airborne ventilation and dust removal system in the second embodiment is the same as the method for determining the required air volume for the fuselage ventilation and dust removal device 9 in the first embodiment. Figure 1 ,include

[0052] S21: Determine the air velocity at the fully mechanized mining face

[0053]

[0054] Where, v0 is the air velocity of the fully mechanized mining face, m / min; Q is the air volume of the fully mechanized mining face, m 3 / min; S is the cross-sectional area of ​​the fully mechanized mining face, m 2 ; D is the top control distance of the fully mechanized mining face, m; β is the angle between the hydraulic support shield beam and the bottom plate, °; H is the mining height of the fully mechanized mining face, m;

[0055] S22: If the wind entering the fully mechanized mining face is not blocked by the coal mining machine 7, causing the coal dust generated by the coal mining machine 7 to spread laterally to the pedestrian side, then the wind volume passing through the coal mining side where the coal mining machine 7 is located should remain unchanged, that is, the upwind ventilation dust collector 1 should suck in and discharge the wind blocked by the coal mining machine 7, thereby ensuring that the wind entering the fully mechanized mining face does not change on the coal mining side and the pedestrian side along the entire length of the fully mechanized mining face; the wind volume blocked by the coal mining machine can be determined to obtain the wind volume that the upwind ventilation dust collector 1 needs to handle

[0056] Q c =ahv0 (3)

[0057] In the formula, Q c The air volume blocked by the coal mining machine is also the air volume required to be processed by the upwind ventilation dust collector, m 3 / min; a is the width of the coal mining machine, m; h is the height of the coal mining machine, m.

[0058] The air volume required to be processed by the downwind side ventilation dust collector 3 can be determined according to the dust production of the corresponding drum.

[0059] In addition to the advantages of embodiment 1, embodiment 2 of the present invention also realizes two functions of rapid dust extraction and purification of coal dust at the coal mining machine drum and preventing coal dust near the coal mining machine body from spreading to the pedestrian side by providing an air guide device, thereby improving the comfort of the operators.

[0060] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of methods under the inspiration of the present invention. Any technical solution that is the same or similar to that of the present application falls within the protection scope of the present invention.

Claims

1. A method for determining the air volume of ventilation and dust removal treatment on a coal mining machine, characterized in that: The following steps are involved: S1: Arrangement of body ventilation dust collector A machine body ventilation dust collector is arranged on the main body of the coal mining machine, and the air inlet and outlet directions of the machine body ventilation dust collector are consistent with the air inlet direction in the fully mechanized mining working face; S2: Determine the air volume required for the machine body ventilation dust collector, including S21: Determine the air velocity at the fully mechanized mining face Where v0 is the air velocity of the fully mechanized mining face, m / min; Q is the air volume of the fully mechanized mining face, m 3 / min; S is the cross-sectional area of ​​the fully mechanized mining face, m 2 ; D is the top control distance of the fully mechanized mining face, m; β is the angle between the hydraulic support shield beam and the bottom plate, °; H is the mining height of the fully mechanized mining face, m; S22: Determine the air volume required for the machine body ventilation dust collector Q c =monkey0 (3) In the formula, Q c is the air volume required by the machine body ventilation dust collector, m 3 / min; a is the width of the coal mining machine, m; h is the height of the coal mining machine, m.

2. A method for determining the air volume of ventilation and dust removal treatment on a coal mining machine, characterized in that: The following steps are involved: S1: Arrangement of airborne ventilation and dust removal system The airborne ventilation and dust removal system comprises an upwind dust collector, a downwind dust collector, an upwind air guide device and a downwind air guide device arranged on the coal mining machine; the upwind dust collector and the downwind dust collector are used to process the coal dust generated by the upwind drum and the downwind drum when cutting coal respectively; the upwind air guide device and the downwind air guide device are arranged in sequence along the length direction of the coal mining machine; the upwind air guide device and the downwind air guide device are connected to the outlets of the upwind dust collector and the downwind dust collector respectively, and the upwind air guide device and the downwind air guide device are provided with air outlets; the wind discharged from the air outlet is directed to the top plate and deviates to the downwind side; S2: Determine the air volume required for the airborne ventilation and dust removal system, including S21: Determine the air velocity at the fully mechanized mining face Where v0 is the air velocity of the fully mechanized mining face, m / min; Q is the air volume of the fully mechanized mining face, m 3 / min; S is the cross-sectional area of ​​the fully mechanized mining face, m 2 ; D is the top control distance of the fully mechanized mining face, m; β is the angle between the hydraulic support shield beam and the bottom plate, °; H is the mining height of the fully mechanized mining face, m; S22: Determine the air volume required for the upwind ventilation and dust removal system Q c =monkey0 (3) In the formula, Q c The air volume blocked by the coal mining machine is also the air volume required to be processed by the upwind ventilation dust collector, m 3 / min; a is the width of the coal mining machine, m; h is the height of the coal mining machine, m.

3. The method for determining the air volume of ventilation and dust removal treatment on a coal mining machine according to claim 2, characterized in that: The air inlet of the upwind ventilation dust collector is connected to the upwind dust hood, and the air inlet of the downwind ventilation dust collector is connected to the downwind dust hood.

4. The method for determining the air volume of ventilation and dust removal treatment on a coal mining machine according to claim 2 or 3, characterized in that: The total length of the upwind side air guide device and the downwind side air guide device shall not be less than the length of the coal mining machine body.

5. The method for determining the air volume of ventilation and dust removal treatment on a coal mining machine according to claim 4, characterized in that: The air volume required to be processed by the downwind ventilation dust collector is determined according to the dust production of the corresponding drum.

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