CN115012822A - Method for drawing thickness contour line of water-resisting layer of coal seam floor based on directional horizontal drilling - Google Patents
Method for drawing thickness contour line of water-resisting layer of coal seam floor based on directional horizontal drilling Download PDFInfo
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Abstract
The invention discloses a method for drawing a thickness contour line of a water-resisting layer of a coal seam floor based on directional horizontal drilling, which comprises the following steps of: establishing relative coordinate systems of different drilling hole depths of the ground directional horizontal drilling by taking the opening hole opening of the ground directional horizontal drilling hole as a coordinate origin, and converting relative plane displacement coordinate values and elevation values of the different drilling hole depths into plane coordinate values and elevation values of a mine plane coordinate system and an elevation system; and calculating the vertical depth value of the ground directional horizontal drilling hole at the top boundary of the mine floor aquifer by taking the opening hole of the ground directional horizontal drilling hole as the origin of coordinates according to the relative vertical depth data of the ground directional horizontal drilling hole, and converting the vertical depth value of the ground directional horizontal drilling hole at the top boundary of the mine floor aquifer into the elevation value of a mine elevation coordinate system and an elevation system. The method solves the problem that the thickness error of the water-resisting layer of the coal seam floor drawn by the construction data of the ground exploration hole and the ground geophysical exploration result is large in the earlier stage.
Description
Technical Field
The invention relates to the technical field of contour line drawing of a coal seam water-resisting layer. In particular to a method for drawing a thickness contour line of a water-resisting layer of a coal seam bottom plate based on ground directional horizontal drilling.
Background
Along with the deepening of the mining depth of the coal mine, the mine exploitation is more and more threatened by water inrush of a bottom plate aquifer. In the current mine exploitation, the technical data of the water-resisting layer of the coal seam floor is usually the result of combining the construction data of the early ground exploration hole with the ground geophysical exploration before the construction and production. After the mine is put into operation, before the underground mining activity of the mine, the underground is not constructed, and the underground is corrected only by a plurality of ground surveys and geophysical prospecting data. Because the ground exploration hole is explored the interval greatly, the ground geophysical prospecting is explored the precision and is low, consequently the thickness of coal seam bottom plate water-stop layer is difficult to accurate the confirming among the coal mining engineering, and coal seam bottom plate water-stop layer bottom plate gushing brings very big harm for high-efficient exploitation of coal seam and safety protection, consequently, the accurate degree of confirming of coal seam bottom plate water-stop layer thickness is concerned with the severity of bottom plate gushing water threat in the coal mining process.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a method for drawing a contour line of the thickness of a water-resisting layer of a coal bed bottom plate based on directional horizontal drilling, so as to solve the problem that the thickness error of the water-resisting layer of the coal bed bottom plate drawn by ground exploration hole construction data and ground geophysical exploration results in the early stage of mine construction is large.
Along with the development of the ground directional horizontal hole drilling grouting technology, the technology is more and more widely applied to mine water control engineering, particularly for exploration of a coal mine floor aquifer, the top boundary position of the coal bed floor aquifer can be accurately explored before underground excavation of a mine, so that the thickness of the coal bed floor aquifer is accurately determined, and a concealed disaster-causing geological abnormal body is assisted to be explored, so that safe construction is ensured. Therefore, the invention researches and designs the contour line drawing method of the thickness of the water-resisting layer of the coal seam floor based on directional horizontal drilling to overcome the existing defects by combining the position data of the coal seam floor in the coal mine exploration process and aiming at the defects that the thickness of the water-resisting layer of the coal mine floor is not clear and has larger error at present.
In order to solve the technical problems, the invention provides the following technical scheme:
a method for drawing a thickness contour line of a water-resisting layer of a coal seam floor based on directional horizontal drilling comprises the following steps:
step (1): establishing relative coordinate systems of different drilling hole depths of the ground directional horizontal drilling by taking the hole opening of the ground directional horizontal drilling hole as a coordinate origin, calculating relative plane displacement coordinate values and elevation values of the ground directional horizontal drilling hole at different drilling hole depths above the top boundary of the mine floor aquifer, and converting the relative plane displacement coordinate values and the elevation values at different drilling hole depths into plane coordinate values and elevation values of a mine plane coordinate system and an elevation system;
step (2): calculating a relative plane displacement coordinate value and a vertical depth value of the ground directional horizontal drilling hole at the top boundary of the mine floor aquifer according to relative plane displacement data and relative vertical depth data of the ground directional horizontal drilling hole at different positions of the top boundary of the mine floor aquifer by taking a hole opening of the ground directional horizontal drilling hole as a coordinate origin, and converting the relative plane displacement coordinate value and the vertical depth value of the ground directional horizontal drilling hole at the top boundary of the mine floor aquifer into a mine floor aquifer top boundary plane coordinate value and a mine floor aquifer top boundary elevation value in a mine plane coordinate system and an elevation system;
and (3): drawing the mine floor aquifer top boundary elevation values and the mine floor aquifer top boundary plane coordinate values at different positions in the extending direction of the ground directional horizontal drilling, which are obtained by measurement and calculation in the step (2), in a mine floor coal seam floor contour map in a form of coordinate points;
and (4): calculating the coal bed bottom plate elevation values of different coordinate points of the bottom plate aquifer top boundary plane at different positions in the extending direction of the ground directional horizontal drilling hole by using an interpolation method, and calculating the elevation value difference between the coal bed bottom plate and the mine bottom plate aquifer top boundary at the same coordinate point, namely the thickness value of the coal bed bottom plate aquifer at the coordinate point;
and (5): determining the distance between points with equal thickness values according to the difference between the maximum value and the minimum value of the obtained thickness value of the coal seam floor water-resisting layer; and (3) equally dividing the difference value of the maximum value and the minimum value of the thickness value of the water-resisting layer of the coal seam floor to obtain 5-20 equal thickness value points, drawing the equal thickness value points in a mine excavation engineering plan and drawing an equal thickness line of the water-resisting layer of the coal seam floor of the mine.
According to the method for drawing the thickness contour line of the water-resisting layer of the coal seam floor based on the directional horizontal drilling, the relative coordinate systems of different drilling hole depths are determined by measuring the construction track parameters of the ground directional horizontal drilling; the construction track parameters include borehole depth, well deviation and azimuth.
According to the method for drawing the thickness contour line of the coal seam floor water-resisting layer based on the directional horizontal drilling, the position of an opening orifice of the ground directional horizontal drilling is determined on the ground, and after a drilling track enters the top boundary of the mine floor water-resisting layer through the horizontal directional branch holes, the drilling track parameter is measured by a drilling orientation measuring instrument every time the drilling track enters 9-10 m.
According to the method for drawing the thickness contour line of the water-resisting layer of the coal seam floor based on the directional horizontal drilling, the relative coordinate systems of different drilling hole depths of the ground directional horizontal drilling are calculated based on a corrected average angle method, and the calculation formula is as follows:
N 0 ＝0；E 0 ＝0；D 0 ＝0；L 0 ＝0；α 0 ＝0；φ 0 ＝0；
in the formula: n is a radical of hydrogen n Relative north-south displacement of the nth measuring point of the drill hole when the opening hole of the ground directional horizontal drill hole is taken as the origin of coordinates, E n Relative east-west displacement of the nth measuring point of the borehole when the opening hole of the ground directional horizontal borehole is taken as the origin of coordinates, D n For drilling holes horizontally and directionally on groundRelative vertical depth of nth measuring point of drilling hole when marking origin, L n When the hole opening of the directional horizontal drilling hole on the ground is taken as the origin of coordinates, the hole depth alpha of the nth measuring point is drilled n When the opening hole of the ground directional horizontal drilling hole is taken as the origin of coordinates, the well deviation phi of the nth measuring point of the drilling hole is measured n The azimuth angle of the nth measuring point of the drilling hole is the azimuth angle when the opening hole of the ground directional horizontal drilling hole is taken as the origin of coordinates.
According to the method for drawing the thickness contour line of the coal seam floor water-bearing layer based on the directional horizontal drilling, the mine floor water-bearing layer top boundary explored by the drilling is comprehensively analyzed and judged according to the gamma value fed back by a measurement instrument while drilling and the change condition of upward rock return powder while drilling, and the relative plane displacement coordinate and the vertical depth value when the mine floor water-bearing layer top boundary explored by the drilling are determined; re-measuring the coordinates of the hole opening of the ground directional horizontal drilling hole under a mine plane coordinate system and an elevation system, and determining initial data X 0 、Y 0 And Z 0 ；X 0 、Y 0 And Z 0 And respectively representing north-south displacement, east-west displacement and elevation values of the ground directional horizontal drilling hole point in a mine plane coordinate system and an elevation system.
In the method for drawing the thickness contour line of the water-resisting layer of the coal seam floor based on the directional horizontal drilling, in the step (1), the calculation method for converting the relative plane displacement coordinate values in the depths of different drilling holes into the plane coordinate values and the elevation values of a mine plane coordinate system and an elevation system comprises the following steps:
X n ＝X 0 +N n ；Y n ＝Y 0 +E n ；Z n ＝Z 0 -D n ；
in the formula: x n 、Y n And Z n Respectively representing north and south displacement, east and west displacement and elevation values of an nth measuring point of a drill hole in a mine plane coordinate system and an elevation system;
in the step (2), the relative plane displacement coordinate value and the vertical depth value of the ground directional horizontal drilling hole in the top boundary of the mine floor aquifer are converted into the mine plane coordinate system and the mine floor aquifer top boundary plane coordinate value and the mine floor aquifer top boundary elevation value of the elevation system, and the calculation method comprises the following steps:
X m holes ＝X 0 +N m holes ；Y m holes ＝Y 0 +E m holes ；Z m holes ＝Z 0 -D m holes ；
In the formula: x m holes 、Y m 、Y m holes And Z m holes Respectively drilling holes on the top boundary of a water-bearing layer of a mine floor, and obtaining north-south displacement, east-west displacement and elevation values of an mth measuring point in a mine plane coordinate system and an elevation system; n is a radical of m holes When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the drilling hole is displaced relative to the south and north of the mth measuring point on the top boundary of the water-bearing layer of the mine floor; e m holes When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the drilling hole is subjected to relative east-west displacement of the mth measuring point on the top boundary of the mine floor aquifer; d m holes When the hole opening of the ground directional horizontal drilling hole is used as the origin of coordinates, the drilling hole is relatively vertical to the mth measuring point on the top boundary of the mine bottom plate aquifer. N is a radical of m holes 、E m holes And D m holes Respectively with N n 、E n And D n The same is true.
In the method for drawing the contour line of the thickness of the water-resisting layer of the coal seam floor based on the directional horizontal drilling, in the step (4), the calculation formula of the thickness value of the water-resisting layer of the coal seam floor is as follows: h m ＝Z m coal -Z m holes ；
In the formula, H m Measure the thickness value of the coal seam floor water-resisting layer, Z m coal And the elevation values of the coal bed bottom plate of the m measuring points in the mine plane coordinate system and the elevation system are obtained.
The method for drawing the thickness contour line of the water-resisting layer of the coal seam floor based on the directional horizontal drilling comprises the following steps of (5): drawing all the coal seam floor water-resisting layer thickness data points in a mine excavation working face plan, and marking the water-resisting layer thickness values of the drawn data points; and determining the distance between the equal thickness value points according to the thickness value change condition, equally dividing the difference value between the maximum value and the minimum value of the thickness value of the water-resisting layer of the coal seam floor to obtain 5-20 equal thickness value points, connecting the data points of the equal thickness values by using a smooth curve, and drawing a contour map of the thickness of the water-resisting layer of the coal seam floor.
The technical scheme of the invention achieves the following beneficial technical effects:
the method utilizes exploration floor aquifer data of ground directional horizontal drilling constructed by coal mine enterprises to combine coal bed floor contour lines of coal mine excavation projects, converts the ground horizontal hole exploration data and the floor contour line coordinate system, calculates the thickness of the aquifer top boundary on a drilling track and the coal bed floor contour lines and mine plane coordinate values, and then sequentially connects the lines to draw an actual coal bed floor aquifer thickness contour line. The method solves the problem that the thickness error of the water-resisting layer of the coal seam floor drawn by the construction data of the ground exploration hole and the ground geophysical exploration result in the earlier stage is large, realizes accurate drawing and real-time correction of the thickness of the water-resisting layer of the coal seam floor, provides accurate reference for coal mine water prevention engineering design and construction, floor abnormal body exploration and the like, and ensures safe coal seam mining.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of the invention illustrating a directional horizontal ground drilling to explore the top boundary of a mine floor aquifer;
FIG. 2 is a graph for plotting the equal thickness of a water-stop layer of a coal seam floor based on ground directional horizontal drilling in the embodiment of the invention.
The reference numbers in fig. 1 are denoted as: 1-coal bed; 2-a coal seam floor; 3-the thickness of a water-resisting layer of the coal seam floor; 4-a coal seam floor water-resisting layer; 5-mine floor aquifer top boundary coordinate points (including hole depth, well deviation, azimuth angle and other data) explored by the ground directional horizontal hole; 6-mine floor aquifer top boundary; 7-orienting the construction track of the horizontal hole on the ground; 8-a coal seam floor aquifer; 9-ground directional horizontal drilling orifice;
reference numerals in fig. 2 denote: 1-ground directional horizontal drilling trajectory; 2-mine excavation engineering plan; 3-measuring points of the thickness of the water-resisting layer of the coal seam floor, including circles and labeled thickness values; 4-coal seam floor water-resisting layer thickness contour line; 5-mine coordinate system.
Detailed Description
The method for drawing the thickness contour line of the water-resisting layer of the coal seam floor based on the directional horizontal drilling in the embodiment comprises the following steps:
step (1): establishing relative coordinate systems of different drilling hole depths of the ground directional horizontal drilling by taking the hole opening of the ground directional horizontal drilling hole as a coordinate origin, calculating relative plane displacement coordinate values and elevation values of the ground directional horizontal drilling hole at different drilling hole depths above the top boundary of the mine floor aquifer, and converting the relative plane displacement coordinate values and the elevation values at different drilling hole depths into plane coordinate values and elevation values of a mine plane coordinate system and an elevation system;
determining relative coordinate systems of different drilling hole depths by measuring construction track parameters of the ground directional horizontal drilling: determining the position of an opening orifice of a ground directional horizontal drilling hole on the ground, and measuring drilling track parameters by using a directional measurement instrument while drilling every 9-10 m after a drilling track enters the top boundary of a mine floor aquifer through a horizontal directional branch hole; the construction track parameters comprise drilling hole depth, well deviation and azimuth;
the relative coordinate system of different drilling hole depths of the ground directional horizontal drilling hole is calculated based on a corrected mean angle method, and the calculation formula is as follows:
N 0 ＝0；E 0 ＝0；D 0 ＝0；L 0 ＝0；α 0 ＝0；φ 0 ＝0；
in the formula: n is a radical of n Relative north-south displacement of the nth measuring point of the drill hole when the opening hole of the ground directional horizontal drill hole is taken as the origin of coordinates, E n When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the relative east-west position of the nth measuring point of the drilling holeMoving, D n When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the relative vertical depth L of the nth measuring point of the drilling hole n When the hole opening of the directional horizontal drilling hole on the ground is taken as the origin of coordinates, the hole depth alpha of the nth measuring point is drilled n When the hole opening of the directional horizontal drilling hole on the ground is taken as the origin of coordinates, the well deviation phi of the nth measuring point of the drilling hole is n The azimuth angle of the nth measuring point of the drilling hole is the azimuth angle when the opening hole of the ground directional horizontal drilling hole is taken as the origin of coordinates.
Comprehensively analyzing and judging the top boundary of the mine floor aquifer explored by the drilling according to the gamma value fed back by the measurement instrument while drilling and the change condition of upward-returning rock powder while drilling, and determining the relative plane displacement coordinate and the vertical depth value when the drilling explores the top boundary of the mine floor aquifer; re-measuring the coordinates of the hole opening of the ground directional horizontal drilling hole under a mine plane coordinate system and an elevation system, and determining initial data X 0 、Y 0 And X 0 ；
The calculation method for converting the relative plane displacement coordinate values of different drilling hole depths into the plane coordinate values of the mine plane coordinate system comprises the following steps:
X n ＝X 0 +N n ；Y n ＝Y 0 +E n ；Z n ＝Z 0 -D n ；
in the formula: x 0 、Y 0 And Z 0 Respectively carrying out north-south displacement, east-west displacement and elevation values of ground directional horizontal drilling hole points in a mine plane coordinate system and an elevation system; x n 、Y n And Z n The displacement values of the nth measuring point of the drill hole in the north and south, the east and west and the elevation values in the mine plane coordinate system and the elevation system are respectively.
Repeating the steps to obtain parameters, coordinates and elevations of a plurality of ground directional horizontal drilling construction tracks so as to probe coordinates and elevation data of a top boundary of a coal seam floor aquifer;
step (2): calculating a relative plane displacement coordinate value and a vertical depth value of the ground directional horizontal drilling hole at the top boundary of the mine floor aquifer according to relative plane displacement data and relative vertical depth data of the ground directional horizontal drilling hole at different positions of the top boundary of the mine floor aquifer by taking a hole opening of the ground directional horizontal drilling hole as a coordinate origin, and converting the relative plane displacement coordinate value and the vertical depth value of the ground directional horizontal drilling hole at the top boundary of the mine floor aquifer into a mine floor aquifer top boundary plane coordinate value and a mine floor aquifer top boundary elevation value in a mine plane coordinate system and an elevation system;
the method for converting the relative plane displacement coordinate value and the vertical depth value of the ground directional horizontal drilling hole in the top boundary of the mine floor aquifer into the mine floor aquifer top boundary plane coordinate value and the mine floor aquifer top boundary elevation value of the mine plane coordinate system and the mine floor aquifer elevation system comprises the following steps:
X m holes ＝X 0 +N m holes ；Y m holes ＝Y 0 +E m holes ；Z m holes ＝Z 0 -D m holes ；
In the formula: x m holes 、Y m holes And Z m holes Respectively Z m holes The drilling holes are south-north displacement, east-west displacement and elevation values of an mth measuring point drilled on the top boundary of a mine floor aquifer in a mine plane coordinate system and an elevation system respectively; n is a radical of m holes When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the drilling hole is displaced relative to the south and north of the mth measuring point on the top boundary of the water-bearing layer of the mine floor; e m holes When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the drilling hole is subjected to relative east-west displacement of the mth measuring point on the top boundary of the mine floor aquifer; d m holes When the hole opening of the ground directional horizontal drilling hole is used as the origin of coordinates, the drilling hole is relatively vertical to the mth measuring point on the top boundary of the mine bottom plate aquifer. N is a radical of m holes 、E m holes And D m holes Respectively with N n 、E n And D n The same is true.
And (3): drawing the mine floor aquifer top boundary elevation values and the mine floor aquifer top boundary plane coordinate values at different positions in the extending direction of the ground directional horizontal drilling obtained by the step (2) in a mine floor coal seam floor contour map in a form of coordinate points;
and (4): calculating the coal bed bottom plate elevation values of different coordinate points of the bottom plate aquifer top boundary plane at different positions in the extending direction of the ground directional horizontal drilling hole by using an interpolation method, and calculating the elevation value difference between the coal bed bottom plate and the mine bottom plate aquifer top boundary at the same coordinate point, namely the thickness value of the coal bed bottom plate aquifer at the coordinate point;
the calculation formula of the thickness value of the water-resisting layer of the coal seam floor is as follows: h m ＝Z m coal -Z m holes ；
In the formula, H m Measure the thickness value of the coal seam floor water-resisting layer, Z m coal Measuring the elevation values of the coal seam floor at m measuring points in a mine plane coordinate system and an elevation system;
the method comprises the steps of exploring a plane coordinate value of a data point of a top boundary of a coal seam floor aquifer according to a ground directional horizontal drilling, extracting the coal seam floor elevation of the data point from a contour map of the coal seam floor of a mine, and calculating the thickness value of the coal seam floor aquifer at a corresponding plane coordinate point by using a coal seam floor aquifer thickness calculation formula.
And (5): determining the distance between points with equal thickness values according to the difference between the maximum value and the minimum value of the obtained thickness value of the coal seam floor water-resisting layer; dividing the difference value of the maximum value and the minimum value of the thickness value of the coal seam floor water-resisting layer equally to obtain 7 equal thickness value points, drawing the equal thickness value points in a mine excavation engineering plan and drawing a mine coal seam floor water-resisting layer equal thickness line; the specific operation method comprises the following steps: drawing all the coal seam floor water-resisting layer thickness data points in a mine excavation working face plan, and marking the water-resisting layer thickness values of the drawn data points; and determining the distance between the equal thickness value points according to the thickness value change condition, equally dividing the difference value between the maximum value and the minimum value of the thickness value of the water-resisting layer of the coal seam floor to obtain 7 equal thickness value points, connecting the data points of the equal thickness values by using a smooth curve, and drawing a contour map of the thickness of the water-resisting layer of the coal seam floor.
FIG. 1 is a schematic cross-sectional view of the mining floor aquifer top boundary explored by directional horizontal drilling on the ground in the embodiment; the thickness contour line of the water-resisting layer of the coal seam floor based on the ground directional horizontal drilling in a mining area is drawn as shown in FIG. 2.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the claims of this patent.
Claims (8)
1. The method for drawing the thickness contour line of the water-resisting layer of the coal seam floor based on the directional horizontal drilling is characterized by comprising the following steps of:
step (1): establishing relative coordinate systems of different drilling hole depths of the ground directional horizontal drilling by taking the hole opening of the ground directional horizontal drilling hole as a coordinate origin, calculating relative plane displacement coordinate values and elevation values of the ground directional horizontal drilling hole at different drilling hole depths above the top boundary of the mine floor aquifer, and converting the relative plane displacement coordinate values and the elevation values at different drilling hole depths into plane coordinate values and elevation values of a mine plane coordinate system and an elevation system;
step (2): calculating a relative plane displacement coordinate value and a vertical depth value of the ground directional horizontal drilling hole at the top boundary of the mine floor aquifer according to relative plane displacement data and relative vertical depth data of the ground directional horizontal drilling hole at different positions of the top boundary of the mine floor aquifer by taking a hole opening of the ground directional horizontal drilling hole as a coordinate origin, and converting the relative plane displacement coordinate value and the vertical depth value of the ground directional horizontal drilling hole at the top boundary of the mine floor aquifer into a mine floor aquifer top boundary plane coordinate value and a mine floor aquifer top boundary elevation value in a mine plane coordinate system and an elevation system;
and (3): drawing the mine floor aquifer top boundary elevation values and the mine floor aquifer top boundary plane coordinate values at different positions in the extending direction of the ground directional horizontal drilling, which are obtained by measurement and calculation in the step (2), in a mine floor coal seam floor contour map in a form of coordinate points;
and (4): calculating the coal bed bottom plate elevation values of different coordinate points of the bottom plate aquifer top boundary plane at different positions in the extending direction of the ground directional horizontal drilling hole by using an interpolation method, and calculating the elevation value difference between the coal bed bottom plate and the mine bottom plate aquifer top boundary at the same coordinate point, namely the thickness value of the coal bed bottom plate aquifer at the coordinate point;
and (5): determining the distance between points with equal thickness values according to the difference between the maximum value and the minimum value of the obtained thickness value of the coal seam floor water-resisting layer; and (3) equally dividing the difference value of the maximum value and the minimum value of the thickness value of the water-resisting layer of the coal seam floor to obtain 5-20 equal thickness value points, drawing the equal thickness value points in a mine excavation engineering plan and drawing an equal thickness line of the water-resisting layer of the coal seam floor of the mine.
2. The directional horizontal drilling based coal seam floor water-resisting layer thickness contour line drawing method according to claim 1, characterized in that relative coordinate systems of different drilling hole depths are determined by measuring construction track parameters of a ground directional horizontal drilling; the construction track parameters include borehole depth, well deviation and azimuth.
3. The directional horizontal drilling based coal seam floor water-bearing layer thickness contour line drawing method is characterized in that the position of an opening orifice of a ground directional horizontal drilling is determined on the ground, and after a drilling track enters the top boundary of a mine floor water-bearing layer through a horizontal directional branch hole, the drilling track parameter is measured by a drilling orientation measuring instrument every 9-10 m of drilling.
4. The directional horizontal drilling based coal seam floor water-stop layer thickness contour line drawing method according to claim 3, characterized in that the relative coordinate systems of different drilling hole depths of the ground directional horizontal drilling are calculated based on a corrected mean angle method, and the calculation formula is as follows:
N 0 ＝0；E 0 ＝0；D 0 ＝0；L 0 ＝0；α 0 ＝0；φ 0 ＝0；
in the formula: n is a radical of hydrogen n Relative north-south displacement of the nth measuring point of the drill hole when the opening hole of the ground directional horizontal drill hole is taken as the origin of coordinates, E n Relative east-west displacement of the nth measuring point of the borehole when the opening hole of the ground directional horizontal borehole is taken as the origin of coordinates, D n When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the relative vertical depth L of the nth measuring point of the drilling hole n When the hole opening of the directional horizontal drilling hole on the ground is taken as the origin of coordinates, the hole depth alpha of the nth measuring point is drilled n When the hole opening of the directional horizontal drilling hole on the ground is taken as the origin of coordinates, the well deviation phi of the nth measuring point of the drilling hole is n The azimuth angle of the nth measuring point of the drilling hole is the azimuth angle when the opening hole of the ground directional horizontal drilling hole is taken as the origin of coordinates.
5. The method for drawing the thickness contour line of the water-bearing layer of the coal seam floor based on the directional horizontal drilling is characterized in that the top boundary of the water-bearing layer of the mine floor under drilling exploration is comprehensively analyzed and judged according to the gamma value fed back by a measurement instrument while drilling and the change condition of upward rock return powder while drilling, and the relative plane displacement coordinate and the vertical depth value when the top boundary of the water-bearing layer of the mine floor under drilling exploration are determined; re-measuring the coordinates of the hole opening of the ground directional horizontal drilling hole under a mine plane coordinate system and an elevation system, and determining initial data X 0 、Y 0 And Z 0 ；X 0 、Y 0 And Z 0 And respectively representing north-south displacement, east-west displacement and elevation values of the ground directional horizontal drilling hole point in a mine plane coordinate system and an elevation system.
6. The directional horizontal drilling based coal seam floor water-resisting layer thickness contour line drawing method according to claim 5, characterized in that in the step (1), the calculation method for converting the relative plane displacement coordinate values at different drilling hole depths into the plane coordinate values and the elevation values of a mine plane coordinate system and an elevation system is as follows:
X n ＝X 0 +N n ；Y n ＝Y 0 +E n ；Z n ＝Z 0 -D n ；
in the formula: x n 、Y n And Z n Respectively representing north and south displacement, east and west displacement and elevation values of an nth measuring point of a drill hole in a mine plane coordinate system and an elevation system;
in the step (2), the relative plane displacement coordinate value and the vertical depth value of the ground directional horizontal drilling hole in the top boundary of the mine floor aquifer are converted into the mine plane coordinate system and the mine floor aquifer top boundary plane coordinate value and the mine floor aquifer top boundary elevation value of the elevation system, and the calculation method comprises the following steps:
X m holes ＝X 0 +N m holes ；Y m holes ＝Y 0 +E m holes ；Z m holes ＝Z 0 -D m holes ；
In the formula: x m holes 、Y m holes And Z m holes Respectively drilling holes on the top boundary of a water-bearing layer of a mine floor, and obtaining north-south displacement, east-west displacement and elevation values of an mth measuring point in a mine plane coordinate system and an elevation system; n is a radical of m holes When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the drilling hole is displaced relative to the south and north of the mth measuring point on the top boundary of the water-bearing layer of the mine floor; e m holes When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the drilling hole is subjected to relative east-west displacement of the mth measuring point on the top boundary of the mine floor aquifer; d m holes When the hole opening of the ground directional horizontal drilling hole is taken as the origin of coordinates, the drilling hole is relatively vertical to the mth measuring point on the top boundary of the mine floor aquifer.
7. Directional horizontal drilling based on claim 6The method for drawing the thickness contour line of the water-resisting layer of the coal seam floor is characterized in that in the step (4), the calculation formula of the thickness value of the water-resisting layer of the coal seam floor is as follows: h m ＝Z m coal -Z m holes ；
In the formula, H m Measure the thickness value of the coal seam floor water-resisting layer, Z m coal And the elevation values of the coal bed bottom plate of the m measuring points in the mine plane coordinate system and the elevation system are obtained.
8. The directional horizontal drilling based coal seam floor water-stop layer thickness contour line drawing method is characterized in that the operation method of the step (5) is as follows: drawing all the coal seam floor water-resisting layer thickness data points in a mine excavation working face plan, and marking the water-resisting layer thickness values of the drawn data points; determining the distance between the equal thickness value points according to the thickness value change condition, equally dividing the difference value between the maximum value and the minimum value of the thickness value of the water-resisting layer of the coal seam floor to obtain 5-20 equal thickness value points, connecting the data points with the same thickness value by using a smooth curve, and drawing a contour map of the thickness of the water-resisting layer of the coal seam floor.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110186A1 (en) * | 2015-01-06 | 2016-07-14 | 中国矿业大学 | Method for integrated drilling, slotting and oscillating thermal injection for coal seam gas extraction |
| CN215170186U (en) * | 2021-04-12 | 2021-12-14 | 北京中煤矿山工程有限公司 | Coal mining bottom plate dredging water simulation device |
-
2022
- 2022-06-06 CN CN202210629040.7A patent/CN115012822A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110186A1 (en) * | 2015-01-06 | 2016-07-14 | 中国矿业大学 | Method for integrated drilling, slotting and oscillating thermal injection for coal seam gas extraction |
| CN215170186U (en) * | 2021-04-12 | 2021-12-14 | 北京中煤矿山工程有限公司 | Coal mining bottom plate dredging water simulation device |
Non-Patent Citations (3)
| Title |
|---|
| 严大思;奚砚涛;潘玲玲;: "基于突水系数的煤矿底板突水危险性评价系统――以山西太原西山煤田古交矿区为例", 中国煤炭地质, no. 04, 25 April 2010 (2010-04-25) * |
| 刘元岐;张文倬;: "鲁布革水电站建设中主要的岩土工程实例", 岩石力学与工程学报, no. 03, 1 October 1991 (1991-10-01) * |
| 刘志成;: "利用Surfer8.0软件绘制煤底板隔水层厚度等值线图", 西部探矿工程, no. 01, 15 January 2018 (2018-01-15) * |
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