Deep hole prospecting and rock drilling method for gently inclined ultrathin-thin ore body

Abstract

The invention relates to the technical field of mining, and discloses a deep hole prospecting and rock drilling method for a gently inclined ultrathin-thin ore body, which comprises the following steps: drilling prospecting deep holes towards a room from the bottom and the top of the room respectively, and stopping drilling when the prospecting deep holes are perpendicular to the trend of the ore body and exceed an ore bed by 1m; the inclination angle of each prospecting deep hole is determined according to the true thickness of an ore bed at the bottom of an ore bed roof, the exploration net degree required by engineering and the average inclination angle of the ore bed; after the length of each prospecting deep hole in the ore bed is measured, the thickness and the inclination angle of each control point of the ore body are calculated; then three-dimensional modeling is carried out based on the thickness and the inclination angle of each control point of the ore body; and according to the three-dimensional modeling, a drill jumbo is used for drilling single-row opposite mining deep holes in the chamber in the lower-stage haulage roadway and the upper-stage haulage roadway. According to the method, a basis can be provided for arrangement of the nearly horizontal deep blast holes of the gently inclined ultrathin-thin ore body, the problem of design deviation of the stoping deep holes in deep hole mining is solved, and the benefit of reducing ore loss and dilution is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of deep hole mining of gently inclined extremely thin ore bodies, and more specifically to a deep hole prospecting and rock drilling method for gently inclined extremely thin ore bodies. Background Art

[0002] The extremely thin and gently inclined ore bodies with a thickness of 0.5-1m are often mined by mining companies due to their small thickness and gentle inclination, which causes waste of resources if the ore value is not high. If the ore value is high, the mining room is mined through continuous circulation during shallow hole mining, but this method has problems such as low production efficiency, high risk of operation in empty areas, large amount of ore mined and difficult to control waste rock mixing. If the deep hole mining method is used, the mining efficiency can be greatly improved. However, if this method does not grasp the actual inclination of the ore body before drilling the blast hole, and the ore body is extremely thin, the deep hole drilled during the operation process is prone to deviate from the ore layer, and the deep hole is driven into the roof or floor, resulting in the mixing of blasting waste rock into the ore during blasting, causing a large amount of ore loss and dilution.

[0003] Therefore, it is necessary to provide a deep hole prospecting and rock drilling method for gently inclined extremely thin-thin ore bodies, so as to effectively avoid the problem of deviation in the deep hole design of deep hole mining, resulting in large losses and dilution. Summary of the invention

[0004] In view of this, the present invention proposes a deep hole prospecting and rock drilling method for gently inclined extremely thin ore bodies to solve the problem of deep hole prospecting for gently inclined extremely thin ore bodies, and effectively avoid the problem of large-scale loss and depletion caused by deviation in deep hole design for deep hole mining.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A method for deep hole prospecting and rock drilling in a gently inclined extremely thin ore body, comprising the following steps:

[0007] (I) Prospecting

[0008] S1. Drill several deep exploration holes into the mine room from the lower stage transportation tunnel and the upper stage transportation tunnel, and the deep exploration holes are perpendicular to the ore body. The deep exploration holes are stopped after they exceed the ore layer by 1m.

[0009] S2. The inclination of each prospecting deep hole is determined according to the true thickness of the ore layer at the bottom of the mine roof, the exploration grid required by the project and the average inclination of the ore layer;

[0010] S3. After measuring the length of each prospecting deep hole in the ore layer, calculate the thickness and inclination of each control point of the ore body;

[0011] S4, performing three-dimensional modeling based on the thickness and inclination of each control point of the ore body;

[0012] (2) Rock drilling

[0013] According to the three-dimensional modeling, a drilling rig is used to drill single-row opposite deep mining holes into the mine chamber in the lower-stage transport tunnel and the upper-stage transport tunnel respectively.

[0014] Furthermore, in step S1 of the prospecting stage of the present invention, the opening position of the prospecting deep hole is located on the horizontal center line of the cross section of the exposed ore layer in the lower stage transport tunnel and the upper stage transport tunnel.

[0015] Furthermore, in step S1 of the prospecting stage of the present invention, the intervals along the strike of each group of boreholes are 5m to 20m, and the intervals along the strike of the starting points of adjacent boreholes on the same side of the same group are 10 to 20cm.

[0016] Furthermore, in step S1 of the prospecting stage of the present invention, i prospecting deep holes are drilled from the lower stage transport tunnel and the upper stage transport tunnel into the top plate and the bottom plate of the ore body respectively, and the calculation formula of i is as follows:

[0017] like Not an integer

[0018]

[0019] like is an integer

[0020]

[0021] Among them, L is the inclined length of the mine room, m; l is the exploration grid along the dip of the ore block required by the project, m.

[0022] Furthermore, in step S2 of the prospecting stage of the present invention, the prospecting drill holes drilled from the stage transport tunnel under the mine room to the top plate of the ore body, starting from the bottom of the mine room, from near to far, the nth (n≤i) prospecting drill hole, its inclination angle is calculated by the following formula:

[0023]

[0024] Where d1 is the true thickness of the ore layer at the bottom of the mine room, m; α is the average inclination of the ore body in the mine room;

[0025] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel under the mine room to the bottom plate of the ore body is as follows:

[0026]

[0027] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel in the mine room to the roof of the ore body, starting from the top of the mine room and from near to far, is as follows:

[0028]

[0029] Where d2 is the true thickness of the ore layer at the top of the mine room, m;

[0030] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel in the mine room to the bottom plate of the ore body, starting from the top of the mine room and from near to far, is as follows:

[0031]

[0032] Further, in step S3 of the prospecting stage of the present invention, the expression formula of the ore body thickness d1' between the control point of the nth prospecting borehole bored from the stage transportation tunnel under the mine room to the ore body top plate, starting from the bottom of the mine room, from near to far and the control point of the nth prospecting borehole bored from the stage transportation tunnel under the mine room to the ore body bottom plate, starting from the bottom of the mine room, from near to far is as follows:

[0033]

[0034] Among them, l n1 It is the length of the exploration borehole drilled from the stage transportation tunnel under the mine room to the roof of the ore body, starting from the bottom of the mine room, from near to far in the ore layer;

[0035] l n2 It is the length of the exploration borehole drilled from the stage transportation tunnel under the mine room to the bottom of the ore body, starting from the bottom of the mine room, from near to far in the ore layer;

[0036] The expression formula for the ore body thickness d2' between the control point of the nth ore body hole drilled from the upper stage transportation tunnel of the mine room to the ore body roof, starting from the top of the mine room, and the control point of the nth ore body hole drilled from the upper stage transportation tunnel of the mine room to the ore body bottom plate, starting from the top of the mine room, from near to far is as follows:

[0037]

[0038] Among them, l n3 It is the length of the exploration borehole drilled from the upper stage transportation tunnel of the mine room to the roof of the ore body, starting from the top of the mine room, from near to far in the ore layer;

[0039] l n4 It is the exploration drill hole drilled from the upper stage transportation tunnel of the mine room to the bottom plate of the ore body. Starting from the top of the mine room, the length of the nth exploration drill hole in the ore layer from near to far.

[0040] Furthermore, in step S3 of the prospecting stage of the present invention, the calculation formula for the ore body inclination at the nth prospecting drill hole control point from the bottom of the mine room to the top plate of the ore body is as follows:

[0041]

[0042] The calculation formula for the ore body inclination at the nth ore body control point from the bottom of the mine room to the bottom of the ore body is as follows:

[0043]

[0044] The calculation formula for the ore body inclination at the nth ore body control point from the top of the mine room to the top of the ore body is as follows:

[0045]

[0046] The calculation formula for the ore body inclination at the nth ore body control point from the top of the mine room to the bottom of the ore body from the stage transportation tunnel of the mine room is as follows:

[0047]

[0048] In step S4 of the prospecting stage, a three-dimensional model is established based on the above prospecting results.

[0049] Furthermore, during the rock drilling stage of the present invention, based on three-dimensional modeling, it is designed to construct opposite mining deep holes in the lower-stage transport tunnel and the upper-stage transport tunnel toward the mine room respectively; each group of opposite mining deep holes consists of a pair of mining deep holes constructed from the lower-stage transport tunnel and the upper-stage transport tunnel toward the mine room; the mining deep holes have a depth of 15 to 45 m, the distance between the mining deep holes and the roof of the mine room is the same as the distance between the mining deep holes and the floor of the mine room, the spacing between the mining deep holes is 0.6 to 1.0 m, and the distance between the bottoms of each group of opposite deep holes is 0.3 to 0.5 m.

[0050] Furthermore, in the present invention, two adjacent rows of blastholes are staggered, and the odd-numbered rows of mining deep holes in the lower stage of transport tunnel construction are 1 to 2 m longer than the mining deep hole blastholes in the upper stage of transport tunnel construction, and the even-numbered rows of mining deep holes in the upper stage of transport tunnel construction are 1 to 2 m longer than the mining deep hole blastholes in the lower stage of transport tunnel construction.

[0051] The gently inclined extremely thin-thin ore body deep hole prospecting and rock drilling method of the present invention comprises the following steps: drilling prospecting deep holes at the bottom and top of the mine room toward the mine room, the prospecting deep holes being perpendicular to the direction of the ore body and stopping after exceeding the ore layer by 1m; the inclination of each prospecting deep hole is determined according to the true thickness of the ore layer at the bottom of the mine room roof, the exploration grid required by the project and the average inclination of the ore layer; after measuring the length of each prospecting deep hole in the ore layer, the thickness and inclination at each control point of the ore body are calculated; then three-dimensional modeling is performed based on the thickness and inclination at each control point of the ore body; and according to the three-dimensional modeling, a rock drilling trolley is used to drill single-row opposite recovery deep holes into the mine room in the lower-stage transport laneway and the upper-stage transport laneway.

[0052] The invention can provide a basis for the arrangement of nearly horizontal deep hole blastholes in gently inclined extremely thin-thin ore bodies, solve the problem of design deviation of recovery deep holes in deep hole mining, and has the benefit of reducing ore loss and dilution. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0054] Figure 1 This is a schematic diagram of the layout of deep holes for prospecting.

[0055] Figure 2 for Figure 1 In the Ⅰ-Ⅰ section diagram, there is an enlarged schematic diagram of the layout of the deep exploration holes at two locations close to the upper and lower stage transportation tunnels.

[0056] Figure 3 for Figure 1 In the Ⅰ-Ⅰ section diagram, there is an enlarged schematic diagram of the layout of the deep exploration holes at three locations between the upper and lower stage transport tunnels.

[0057] Figure 4 Schematic diagram of deep hole layout for mining.

[0058] Figure 5 for Figure 2 Ⅱ-Ⅱ cross-section diagram.

[0059] In the figure: 1-lower stage transport tunnel, 2-exploration deep hole, 3-upper stage transport tunnel, 4-pillar, 5-mining deep hole. DETAILED DESCRIPTION

[0060] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0061] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0063] The present invention provides a method for deep hole prospecting and rock drilling in a gently inclined extremely thin ore body, comprising the following steps:

[0064] (I) Prospecting

[0065] S1. Drill several deep exploration holes into the mine room from the lower stage transportation tunnel and the upper stage transportation tunnel, and the deep exploration holes are perpendicular to the ore body. The deep exploration holes are stopped after they exceed the ore layer by 1m.

[0066] Specifically, the opening position of the prospecting deep hole is located on the horizontal center line of the exposed ore layer section of the lower stage transportation tunnel and the upper stage transportation tunnel;

[0067] The interval between each group of boreholes along the strike direction is 5m to 20m, and the interval between the starting points of adjacent boreholes on the same side of the same group along the strike direction is 10 to 20cm;

[0068] From the lower stage transportation tunnel and the upper stage transportation tunnel of the mine room, i exploration deep holes are drilled into the top and bottom plates of the ore body respectively. The calculation formula of i is as follows:

[0069] like Not an integer

[0070]

[0071] like is an integer

[0072]

[0073] Among them, L is the inclined length of the mine room, m; l is the exploration grid along the dip of the ore block required by the project, m;

[0074] S2. The inclination of each prospecting deep hole is determined according to the true thickness of the ore layer at the bottom of the mine roof, the exploration grid required by the project and the average inclination of the ore layer;

[0075] Specifically, the calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel under the mine room to the top of the ore body is as follows:

[0076]

[0077] Where d1 is the true thickness of the ore layer at the bottom of the mine room, m; α is the average inclination of the ore body in the mine room;

[0078] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel under the mine room to the bottom plate of the ore body is as follows:

[0079]

[0080] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel in the mine room to the roof of the ore body, starting from the top of the mine room and from near to far, is as follows:

[0081]

[0082] Where d2 is the true thickness of the ore layer at the top of the mine room, m;

[0083] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel in the mine room to the bottom plate of the ore body, starting from the top of the mine room and from near to far, is as follows:

[0084]

[0085] S3. After measuring the length of each prospecting deep hole in the ore layer, calculate the thickness and inclination of each control point of the ore body;

[0086] Specifically, the expression formula for the ore body thickness d1' between the control point of the nth ore body exploration hole drilled from the stage transportation tunnel under the mine room to the ore body roof, starting from the bottom of the mine room, and the control point of the nth ore body exploration hole drilled from the stage transportation tunnel under the mine room to the ore body bottom plate, starting from the bottom of the mine room, and from the near to the farthest is as follows:

[0087]

[0088] Among them, l n1 It is the length of the exploration borehole drilled from the stage transportation tunnel under the mine room to the roof of the ore body, starting from the bottom of the mine room, from near to far in the ore layer;

[0089] l n2 It is the length of the exploration borehole drilled from the stage transportation tunnel under the mine room to the bottom of the ore body, starting from the bottom of the mine room, from near to far in the ore layer;

[0090] The expression formula for the ore body thickness d2' between the control point of the nth ore body hole drilled from the upper stage transportation tunnel of the mine room to the ore body roof, starting from the top of the mine room, and the control point of the nth ore body hole drilled from the upper stage transportation tunnel of the mine room to the ore body bottom plate, starting from the top of the mine room, from near to far is as follows:

[0091]

[0092] Among them, l n3 It is the length of the exploration borehole drilled from the upper stage transportation tunnel of the mine room to the roof of the ore body, starting from the top of the mine room, from near to far in the ore layer;

[0093] l n4 It is the length of the exploration borehole drilled from the upper stage transportation tunnel of the mine room to the bottom plate of the ore body, starting from the top of the mine room, from near to far in the ore layer;

[0094] The calculation formula for the ore body inclination at the nth ore body control point from the bottom of the mine room to the top of the ore body from the stage transportation tunnel under the mine room is as follows:

[0095]

[0096] The calculation formula for the ore body inclination at the nth ore body control point from the bottom of the mine room to the bottom of the ore body is as follows:

[0097]

[0098] The calculation formula for the ore body inclination at the nth ore body control point from the top of the mine room to the top of the ore body is as follows:

[0099]

[0100] The calculation formula for the ore body inclination at the nth ore body control point from the top of the mine room to the bottom of the ore body from the stage transportation tunnel of the mine room is as follows:

[0101]

[0102] S4. According to the above prospecting results, three-dimensional modeling is performed based on the thickness and inclination of each control point of the ore body;

[0103] (2) Rock drilling

[0104] According to the three-dimensional modeling, a drilling rig is used to drill single-row opposite deep mining holes into the mine chamber in the lower-stage transport tunnel and the upper-stage transport tunnel respectively.

[0105] Specifically, according to the three-dimensional modeling, it is designed to construct opposite mining deep holes from the lower-stage transport tunnel and the upper-stage transport tunnel to the mine room respectively; each group of opposite mining deep holes consists of a pair of mining deep holes constructed from the lower-stage transport tunnel and the upper-stage transport tunnel to the mine room; the mining deep holes are 15 to 45m deep, the distance between the mining deep holes and the mine room roof is the same as the distance between the mining deep holes and the mine room floor, the spacing between the mining deep holes is 0.6 to 1.0m, and the distance between the bottoms of each group of opposite deep holes is 0.3 to 0.5m.

[0106] The two adjacent rows of blast holes are arranged in a staggered manner. The odd-numbered rows of deep mining holes in the lower stage of transport tunnel construction are 1 to 2 meters longer than the deep mining holes blast holes in the upper stage of transport tunnel construction. The even-numbered rows of deep mining holes in the upper stage of transport tunnel construction are 1 to 2 meters longer than the deep mining holes blast holes in the lower stage of transport tunnel construction.

[0107] Example:

[0108] The thickness of the gently inclined and extremely thin ore body is 0.8m. The stages are divided along the inclination of the ore body. The oblique length of the ore block is 60m. The ore block is divided along the strike of the ore body. The width of the ore block is 60m. The average inclination of the ore block is 15°. 4 pillars are set on both sides of the mine room. The width of the pillar 4 is 3m.

[0109] The method for deep hole prospecting and rock drilling for the above-mentioned gently inclined and extremely thin ore body comprises the following steps:

[0110] (I) Prospecting

[0111] See also Figure 1 , Figure 2 , Figure 3 ( Figure 1 Location A in the middle refers to the cutting uphill structure), and several exploration deep holes 2 are drilled into the mine room in the lower stage transportation tunnel 1 and the upper stage transportation tunnel 3 respectively. The openings of the exploration deep holes are located on the horizontal center line of the cross-section of the exposed ore layer in the lower stage transportation tunnel and the upper stage transportation tunnel, and the exploration deep holes are perpendicular to the direction of the ore body. The exploration deep holes stop after exceeding the ore layer by 1m.

[0112] The interval between each group of boreholes along the strike is 10m, and the interval between the starting points of adjacent boreholes on the same side of the same group along the strike is 10cm;

[0113] From the lower stage transportation tunnel and the upper stage transportation tunnel of the mine room, i exploration deep holes are drilled into the top and bottom plates of the ore body respectively. The calculation formula of i is as follows:

[0114]

[0115] Among them, L is the inclined length of the mine room, m; the inclined length of the mine room is 57m;

[0116] l is the exploration grid length along the ore block dip required by the project, m; the exploration grid length along the ore block dip required by the project is 10 m;

[0117] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel under the mine room to the top of the ore body is as follows:

[0118]

[0119] Wherein, d1 is the true thickness of the ore layer at the bottom of the mine room, m; the true thickness of the ore layer at the bottom of the mine room is 0.8m;

[0120] α is the average inclination of the ore body in the mine room; the average inclination of the ore body in the mine room is 15°;

[0121] There are three prospecting holes drilled from the lower stage transportation tunnel of the mine room to the top of the ore body. Starting from the bottom of the mine room, from near to far, the inclination angles of the prospecting holes are 17.29°, 16.15°, and 15.74° respectively;

[0122] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel under the mine room to the bottom plate of the ore body is as follows:

[0123]

[0124] There are three prospecting holes drilled from the stage transportation tunnel under the mine room to the bottom of the ore body. Starting from the bottom of the mine room, from near to far, the inclination angles of the prospecting holes are 12.71°, 13.85°, and 14.26° respectively;

[0125] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel in the mine room to the roof of the ore body, starting from the top of the mine room and from near to far, is as follows:

[0126]

[0127] Wherein, d2 is the true thickness of the ore layer at the top of the mine room, m; the true thickness of the ore layer at the top of the mine room is 0.8m;

[0128] There are three prospecting drill holes drilled from the upper stage transportation tunnel of the mine room to the roof of the ore body. Starting from the top of the mine room, from near to far, the inclination angles of the prospecting drill holes are 12.71°, 13.85°, and 14.26° respectively.

[0129] The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel in the mine room to the bottom plate of the ore body, starting from the top of the mine room and from near to far, is as follows:

[0130]

[0131] There are three prospecting drill holes drilled from the upper stage transportation tunnel of the mine room to the bottom plate of the ore body. Starting from the top of the mine room, from near to far, the inclination angles of the prospecting drill holes are 17.29°, 16.15°, and 15.74° respectively.

[0132] The expression formula for the ore body thickness d1' between the control point of the nth ore body hole drilled from the stage transportation tunnel under the mine room to the ore body roof, starting from the bottom of the mine room, and the control point of the nth ore body hole drilled from the stage transportation tunnel under the mine room to the ore body bottom plate, starting from the bottom of the mine room, from near to far is as follows:

[0133]

[0134] Among them, l n1 is the length of the nth prospecting borehole in the ore layer from the transport tunnel under the mine room to the roof of the ore body. Starting from the bottom of the mine room, from near to far, l n1 The values ​​are 10.01m, 20.51m, 29.52m;

[0135] l n2 is the length of the nth prospecting borehole in the ore layer from the transport tunnel under the mine room to the bottom of the ore body. Starting from the bottom of the mine room, from near to far, l n2 The values ​​are 10.51m, 20.02m, and 29.01m respectively.

[0136] Starting from the bottom of the mine room, from near to far, the thickness d1' of the ore body between each pair of upper and lower control points is 0.95m, 0.94m, and 0.89m respectively;

[0137] The expression formula for the ore body thickness d2' between the control point of the nth ore body hole drilled from the upper stage transportation tunnel of the mine room to the ore body roof, starting from the top of the mine room, and the control point of the nth ore body hole drilled from the upper stage transportation tunnel of the mine room to the ore body bottom plate, starting from the top of the mine room, from near to far is as follows:

[0138]

[0139] Among them, l n3 is the length of the nth prospecting borehole in the ore layer from the upper stage transportation tunnel of the mine room to the roof of the ore body, starting from the top of the mine room, from near to far; starting from the top of the mine room, from near to far, l n3 The values ​​are 9.97m, 19.91m, 29.95m;

[0140] l n4 It is the length of the nth exploration borehole in the ore layer from the upper stage transportation tunnel of the mine room to the bottom plate of the ore body, starting from the top of the mine room, from near to far. n4 The values ​​are 9.91m, 19.89m, 30.47m;

[0141] Starting from the top of the mine room, from near to far, the thickness d2' of the ore body between each pair of upper and lower control points is 0.79m, 0.80m, and 0.94m respectively;

[0142] The calculation formula for the ore body inclination at the nth ore body control point from the bottom of the mine room to the top of the ore body from the stage transportation tunnel under the mine room is as follows:

[0143]

[0144] The prospecting boreholes drilled from the stage transportation tunnel under the mine room to the top of the ore body, starting from the bottom of the mine room, from near to far, the ore body inclinations at the control points of the prospecting boreholes are 9.18°, 16.15°, and 16.13° respectively;

[0145] The calculation formula for the ore body inclination at the nth ore body control point from the bottom of the mine room to the bottom of the ore body is as follows:

[0146]

[0147] The prospecting boreholes drilled from the stage transportation tunnel under the mine room to the ore body floor, starting from the bottom of the mine room, from near to far, the ore body inclinations at the control points of the prospecting boreholes are 12.73°, 15.01°, and 12.71° respectively;

[0148] The calculation formula for the ore body inclination at the nth ore body control point from the top of the mine room to the top of the ore body is as follows:

[0149]

[0150] The prospecting boreholes drilled from the upper stage transportation tunnel of the mine room to the top of the ore body, starting from the top of the mine room, from near to far, the ore body inclinations at the control points of the prospecting boreholes are 14.99°, 15.03°, and 15.41° respectively;

[0151] The calculation formula for the ore body inclination at the nth ore body control point from the top of the mine room to the bottom of the ore body from the stage transportation tunnel of the mine room is as follows:

[0152]

[0153] The prospecting boreholes drilled from the stage transportation tunnel in the mine room to the ore body floor, starting from the top of the mine room, from near to far, the ore body inclinations at the control points of the prospecting boreholes are 15.05°, 15.06°, and 15.74° respectively;

[0154] According to the above prospecting results, a three-dimensional model is established;

[0155] (2) Rock drilling

[0156] According to the 3D modeling, a drilling rig is used to drill single-row opposite deep mining holes into the mine room in the lower-stage transport tunnel and the upper-stage transport tunnel respectively;

[0157] For details, see Figure 4 , Figure 5 ( Figure 4 (B in the middle refers to the cutting uphill structure). According to the three-dimensional modeling, it is designed to construct opposite deep mining holes 5 in the lower stage transportation tunnel 1 and the upper stage transportation tunnel 3 to the mine room. Each group of opposite deep mining holes consists of a pair of deep mining holes constructed from the lower stage transportation tunnel and the upper stage transportation tunnel to the mine room. The short hole is 27m deep and the long hole is 29m deep. The distance between the deep mining hole and the roof of the mine room is the same as the distance between the deep mining hole and the bottom of the mine room. The row spacing of the deep mining holes is 1.0m, and the distance between the bottom of each group of opposite deep holes is 0.5m. The two adjacent rows of blastholes are arranged in a staggered manner. The odd-numbered rows of deep mining holes constructed in the lower stage transportation tunnel are 2m longer than the deep mining holes constructed in the upper stage transportation tunnel, and the even-numbered rows of deep mining holes constructed in the upper stage transportation tunnel are 2m longer than the deep mining holes constructed in the lower stage transportation tunnel.

[0158] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0159] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for deep hole prospecting and rock drilling in a gently inclined extremely thin ore body, characterized in that: The following steps are involved: (I) Prospecting S1. Drill several deep exploration holes into the mine room from the lower stage transportation tunnel and the upper stage transportation tunnel, and the deep exploration holes are perpendicular to the ore body. The deep exploration holes are stopped after they exceed the ore layer by 1m. S2. The inclination of each prospecting deep hole is determined according to the true thickness of the ore layer at the bottom of the mine roof, the exploration grid required by the project and the average inclination of the ore layer; S3. After measuring the length of each prospecting deep hole in the ore layer, calculate the thickness and inclination of each control point of the ore body; S4, performing three-dimensional modeling based on the thickness and inclination of each control point of the ore body; (2) Rock drilling According to the three-dimensional modeling, a drilling rig is used to drill single-row opposite deep mining holes into the mine chamber in the lower-stage transport tunnel and the upper-stage transport tunnel respectively.

2. A method for deep hole prospecting and rock drilling of gently inclined extremely thin ore bodies according to claim 1, characterized in that: In step S1 of the prospecting stage, the opening position of the prospecting deep hole is located on the horizontal center line of the exposed ore layer section of the lower stage transport tunnel and the upper stage transport tunnel.

3. A method for deep hole prospecting and rock drilling of gently inclined extremely thin ore bodies according to claim 1, characterized in that: In step S1 of the prospecting stage, the intervals along the strike of each group of boreholes are 5 to 20 meters, and the intervals along the strike of the starting points of adjacent boreholes on the same side of the same group are 10 to 20 cm.

4. A method for deep hole prospecting and rock drilling in a gently inclined, extremely thin ore body according to any one of claims 1 to 3, characterized in that: In step S1 of the prospecting stage, i prospecting deep holes are drilled from the lower stage transport tunnel and the upper stage transport tunnel into the top and bottom plates of the ore body respectively. The calculation formula of i is as follows: like Not an integer like is an integer Among them, L is the inclined length of the mine room, m; l is the exploration grid along the dip of the ore block required by the project, m.

5. A method for deep hole prospecting and rock drilling of gently inclined extremely thin ore bodies according to claim 4, characterized in that: In step S2 of the prospecting stage, the prospecting boreholes drilled from the stage transportation tunnel under the mine room to the top plate of the ore body, starting from the bottom of the mine room, from near to far, the nth (n≤i) prospecting borehole, its inclination is calculated as follows: Where d1 is the true thickness of the ore layer at the bottom of the mine room, m; α is the average inclination of the ore body in the mine room; The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel under the mine room to the bottom plate of the ore body is as follows: The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel in the mine room to the roof of the ore body, starting from the top of the mine room and from near to far, is as follows: Where d2 is the true thickness of the ore layer at the top of the mine room, m; The calculation formula for the inclination angle of the prospecting drill hole drilled from the stage transportation tunnel in the mine room to the bottom plate of the ore body, starting from the top of the mine room and from near to far, is as follows:

6. A method for deep hole prospecting and rock drilling in a gently inclined, extremely thin ore body according to claim 5, characterized in that: In step S3 of the prospecting stage, the expression formula of the ore body thickness d1' between the control point of the nth prospecting borehole bored from the stage transportation tunnel under the mine room to the ore body roof, starting from the bottom of the mine room, from near to far, and the control point of the nth prospecting borehole bored from the stage transportation tunnel under the mine room to the ore body bottom plate, starting from the bottom of the mine room, from near to far, is as follows: Among them, l n1 It is the length of the exploration borehole drilled from the stage transportation tunnel under the mine room to the roof of the ore body, starting from the bottom of the mine room, from near to far in the ore layer; l n2 It is the length of the exploration borehole drilled from the stage transportation tunnel under the mine room to the bottom of the ore body, starting from the bottom of the mine room, from near to far in the ore layer; The expression formula for the ore body thickness d2' between the control point of the nth ore body hole drilled from the upper stage transportation tunnel of the mine room to the ore body roof, starting from the top of the mine room, and the control point of the nth ore body hole drilled from the upper stage transportation tunnel of the mine room to the ore body bottom plate, starting from the top of the mine room, from near to far is as follows: Among them, l n3 It is the length of the exploration borehole drilled from the upper stage transportation tunnel of the mine room to the roof of the ore body, starting from the top of the mine room, from near to far in the ore layer; l n4 It is the exploration drill hole drilled from the upper stage transportation tunnel of the mine room to the bottom plate of the ore body. Starting from the top of the mine room, the length of the nth exploration drill hole in the ore layer from near to far.

7. A method for deep hole prospecting and rock drilling in a gently inclined ultra-thin ore body according to claim 6, characterized in that: In step S3 of the prospecting stage, the formula for calculating the ore body inclination at the nth prospecting drill hole control point from the bottom of the mine room to the top of the ore body is as follows: The calculation formula for the ore body inclination at the nth ore body control point from the bottom of the mine room to the bottom of the ore body is as follows: The calculation formula for the ore body inclination at the nth ore body control point from the top of the mine room to the top of the ore body is as follows: The calculation formula for the ore body inclination at the nth ore body control point from the top of the mine room to the bottom of the ore body from the stage transportation tunnel of the mine room is as follows: In step S4 of the prospecting stage, a three-dimensional model is established based on the above prospecting results.

8. A method for deep hole prospecting and rock drilling in a gently inclined, extremely thin ore body according to claim 1, characterized in that: During the rock drilling stage, according to the three-dimensional modeling, it is designed to construct opposite mining deep holes from the lower-stage transport tunnel and the upper-stage transport tunnel to the mine room respectively; each group of opposite mining deep holes consists of a pair of mining deep holes constructed from the lower-stage transport tunnel and the upper-stage transport tunnel to the mine room; the mining deep holes are 15 to 45m deep, the distance between the mining deep holes and the mine room roof is the same as the distance between the mining deep holes and the mine room floor, the spacing between the mining deep holes is 0.6 to 1.0m, and the distance between the bottoms of each group of opposite deep holes is 0.3 to 0.5m.

9. A method for deep hole prospecting and rock drilling in a gently inclined extremely thin ore body according to claim 8, characterized in that: The two adjacent rows of blast holes are arranged in a staggered manner. The odd-numbered rows of deep mining holes in the lower stage of transport tunnel construction are 1 to 2 meters longer than the deep mining holes blast holes in the upper stage of transport tunnel construction. The even-numbered rows of deep mining holes in the upper stage of transport tunnel construction are 1 to 2 meters longer than the deep mining holes blast holes in the lower stage of transport tunnel construction.

Images